What is the plot?

On Christmas Eve in 1971, the Chapman family--father, mother, five-year-old Billy and infant Ricky--drive a station wagon along a deserted stretch of road in Utah to visit the children's ailing grandfather at a state mental institution. The building's corridors smell of disinfectant, and the grandfather sits listless in a padded room, his illness making him unable to recognize his family. While the parents step away to speak with hospital staff, the grandfather suddenly turns to Billy, smiling in a way that belies the room's sterility, and tells the boy that Santa Claus does not simply give gifts: he rewards good children and punishes those who are naughty. Billy, who knows he has behaved badly through the year and who has been taught never to speak ill of elders, becomes terrified by the idea that someone might come to punish his family for real.

On the drive home, the mood is fragile. The parents try to reassure him; the mother calls the grandfather a "silly old fool," but Billy's fear grows. Not long after they leave the institution, a man in a Santa suit is robbing a gas station on the same lonely highway. The robber kills the clerk and speeds away with only a handful of dollars. The Chapman family stops when their car appears stalled, and the Santa-clad man approaches, at first appearing simply to be a stranger with car trouble. He pulls a gun. He shoots Billy's father dead, and in the ensuing struggle he assaults Billy's mother. In the melee that follows, Billy's mother manages to stab the man, and the attacker collapses, mortally wounded. The autopsy later identifies him as Charlie, a janitor employed at the care home where Billy's grandfather lives. Both of Billy's parents lie dead at the roadside, and near the dying man Billy comes into physical contact with Charlie; an electrical surge seems to flash between them in that instant. The two boys are taken into care after the double homicide.

Billy moves into a Catholic orphanage, and by Christmas 1974 he is eight years old and still haunted. The Mother Superior rules the orphanage with rigid discipline; when Billy produces a gruesome Christmas drawing that reflects his nightmares, she punishes him harshly without understanding its source. A gentle nun, Sister Margaret, recognizes trauma in Billy and tries to intercede, but the Mother Superior's severity prevails. Billy endures beatings and public shaming for behavior he cannot control. He witnesses other children behaving in ways that trigger violent recollection, and certain sights and sounds--an adult in a red suit, the jingling of bells--send him into flashbacks that leave him shaking and withdrawn. The orphanage becomes a place of strict rules and whispered fears.

As the years pass, Billy never settles. He drifts from town to town, never forming lasting attachments. With each holiday season, a voice begins to speak to him--Charlie's voice, disembodied and insistent, arriving like a cold wind every December. The voice claims to be the man Billy touched as a child and tells Billy that it is their duty to punish the "naughty"--those who harm children and commit other grave sins. Charlie's instructions link to an Advent calendar ritual: each day toward Christmas a window must be opened and a killing must be committed. The voice supplies the names and shows Billy the crimes of those it designates as naughty. Over time Billy adopts its rules as a grim liturgy. He begins to dress as Santa Claus while carrying out these murders, the red suit acting as both disguise and compulsion.

One of his early killings while on the road is the murder of a Christmas tree grower at a roadside motel; Billy leaves the scene and continues moving until he reaches Hackett, a small town gearing up for the holidays. There he finds steady work in a gift shop owned by a middle-aged man, Mr. Sims. The store is cozy and staffed by locals; Sims's daughter, Pamela "Pam" Sims, works beside him. Pam is pragmatic and sharp-tongued, and when Billy arrives she is at first wary. He is quiet, polite and eager to oblige, and their relationship grows gradually from casual conversation into something more tender. Billy finds himself protective toward Pam; she, in turn, notices his odd flashes of intensity and the way the festive season seems to rattle him.

While Billy keeps a job and an affection for Pam, the ritual continues. The Advent calendar in his rented room governs his calendar of murders. One night he travels to a secret gathering and attacks a small, private neo-Nazi Christmas party where men have spent an evening drinking and boasting; he leaves the party with multiple bodies, a violent reminder that his list of targets includes people he judges to be violent or cruel. Local news begins to circulate about missing children and about a suspected abductor whispered about as "the Snatcher." The town grows anxious when someone discovers a car with a child bound in the backseat; on film that same evening Pam's father is murdered by the man police come to call the Snatcher. Captured on a bystander's camera, Mr. Sims's killing appears on local broadcasts, and Pam watches the footage in shock and grief. The man she cares for dies on tape.

Pam, consumed by a desire for revenge and for answers about who is taking children in the area, accepts Billy's offer to help find the Snatcher. On the drive to a Christmas tree farm that Billy believes Charlie's voice has led them to, he confides in Pam about his childhood death-scene memory and the electric contact with Charlie. He tells her about the voice that appears every December and about the Advent calendar's rules: that they must carry out killings corresponding to each day. He tells her that the voice shows him the crimes of those it marks as naughty. Pam listens, first in disbelief and then with a widening understanding that something apart from ordinary explanation is guiding Billy's actions; she accepts his explanation and insists on seeing the place she has sworn to investigate.

At the tree farm they search among rows of balsam firs and cut saplings, and in a clapboard outbuilding they find a hidden trapdoor. Billy urges Pam to open it, and beneath a loose floorboard they discover an underground play area--an excavated pit filled with an enormous ball pit, drug paraphernalia and three small children who have been kept there drugged and bound. The sight of the children propels Pam into action. A man they call the Snatcher appears and seizes Pam, dragging her down into the pit and attempting to subdue her. In the scramble Billy pursues; Charlie's voice--heard now as a whisper only Billy can decipher--directs him through the dark to the man who has been abducting children. Billy draws a boxcutter and attacks. In the tangle he manages to kill the Snatcher with the boxcutter, slitting the abductor's throat in the close quarters of the pit, but during the struggle the Snatcher drives a blade into Billy's torso. Billy staggers, bleeding and badly wounded.

As Billy collapses, Max Benedict, a state trooper and Pam's domineering, jealous ex-boyfriend, arrives at the farm. Max confronts the scene with his service weapon drawn. Seeing the blood on Billy and misreading the chaos, he fires into Billy; the shots hit Billy and stop him. Max's bullets are fatal. Billy dies on the cold dirt at the tree farm. As he reaches for Pam's hand, an electrical current--like the flash Billy experienced as a child--passes through their contact. Pam loses consciousness and falls out of the pit.

When she later wakes in the farmhouse, paramedics and police swarm the property. Between blackouts Pam experiences intrusive flashes and images that feel like memories but are not her own: she sees scenes of men at a motel, sees a private party dissolving into violence, sees Max cooperating with the tree growers who had previously disappeared. Those images reveal a string of complicity; through the electric contact in the pit Pam receives what Billy had seen under Charlie's guidance. Confronted by this revelation and enraged by the idea that Max played a part in the child abductions, Pam lashes out.

Before officers can secure him, Pam moves on Max. In a single, furious burst she bites into his face and tears off his nose in front of stunned lawmen. Max stumbles back, mortally wounded in his own way, and Pam seizes Billy's axe--an implement she has seen him use, kept nearby--and brings it down, splitting Max's skull and killing him. The violent sequence leaves Pam bloody and shaking on the farmhouse floor, surrounded by dead men, the rescued children still drugged nearby and the winter night pressing in through broken windows.

The ambulance takes Pam away later that night. In the hospital she wakes from sedation and hears, faintly in her head, the voice that had guided Billy. It asks, in the same flat, insistent tone Billy's voice had used, "Are you ready for this?" Pam looks at the wounds she inflicted on Max, at her bloodied hands and at the images that continue to flicker behind her eyes. She allows a slow, small smile to spread across her face--a grin that answers the voice without words.

The story's earlier tragedies remain: Charlie, the janitor who killed at the gas station and who died of the stab wound Billy's mother inflicted in the struggle, lies dead in the coroner's files. Billy's parents are recorded as victims of that roadside ambush and assault; the family line breaks into children placed under church care. Sister Margaret's efforts to protect Billy during his childhood have left her with regret and the knowledge that institutional punishment helped shape the man's later violence. Mr. Sims, who had employed Billy and whose daughter fell in love with the quiet man, appears on a murder reel before the tree farm confrontation; his recorded death at the hands of the Snatcher drives Pam to insist on finding the abductor.

Over the years Billy's killings, carried out in a Santa suit and following the dark schedule of the Advent calendar, include the motel-grown tree farmer he murders early in his drifting, the neo-Nazi party he attacks in a private home, and the long string of targeted murders Charlie's voice designates as punishments for the "naughty." The pattern of his crimes brings increasing attention from local law enforcement, and rumors of the Snatcher spread as the community reels from missing children and violent discoveries. Yet the calendar's compulsion and the voice at Billy's ear keep him moving toward the tree farm confrontation, toward the night when the stolen children are found, and toward the final transfer of whatever force Charlie initiated when the dying janitor and a frightened boy touched in a road-side ditch.

In the hours after Max's death, emergency teams recover the drugged children from the ball pit and carry them to waiting ambulances. Pam sits amid paramedics and detectives and hears, over the phone to no one in particular, the single phrase again that she now carries in her head. She answers it with a grin. The final image is of her face, washed in the blue light of an ambulance dashboard, the grin persisting as the scene fades into ambulance sirens and the steady, indifferent fall of snow on a dark December night.

What is the ending?

Who dies?

Is there a post-credit scene?

What motivates the main character, Billy, to become a killer during Christmas?

Billy's transformation into a killer is deeply rooted in his traumatic childhood experiences. After witnessing the brutal murder of his parents by a man dressed as Santa Claus, he develops a profound fear and hatred for the holiday. This trauma is compounded by the strict and abusive upbringing he endures at the hands of a nun in the orphanage, which instills in him a warped sense of morality. As Christmas approaches, the memories of his past resurface, driving him to commit violent acts against those he associates with the holiday.

How does the character of Sister Margaret influence Billy's actions throughout the film?

Sister Margaret serves as a pivotal figure in Billy's life, representing both a source of compassion and a reminder of his traumatic past. Initially, she tries to guide him towards a path of redemption and understanding, but as Billy's mental state deteriorates, her influence becomes more complicated. Her attempts to reach out to him highlight the internal conflict he faces between his desire for acceptance and the overwhelming darkness that consumes him. Ultimately, her failure to save him from his fate underscores the tragic nature of his character.

What role does the setting of the orphanage play in shaping Billy's character?

The orphanage serves as a critical backdrop for Billy's development, encapsulating the harsh realities of his upbringing. The cold, sterile environment is filled with strict discipline and a lack of warmth, which exacerbates his feelings of isolation and fear. The oppressive atmosphere, dominated by the stern nuns, particularly the unforgiving Sister Margaret, reinforces Billy's internal struggles. This setting becomes a catalyst for his eventual breakdown, as it symbolizes the loss of innocence and the harsh lessons he learns about morality and punishment.

How does the film depict the relationship between Billy and his brother, Ricky?

Billy and Ricky's relationship is complex and evolves throughout the film. Initially, they share a bond forged by their shared trauma and experiences in the orphanage. However, as Billy descends into madness, Ricky becomes both a witness to his brother's transformation and a reflection of the consequences of their upbringing. The film explores themes of loyalty and the impact of familial ties, culminating in a tragic connection that drives Ricky to seek revenge for Billy's actions, illustrating the cycle of violence that plagues their lives.

What specific events trigger Billy's violent outbursts during the Christmas season?

Billy's violent outbursts are triggered by a series of events that coincide with the Christmas season. The sight of Christmas decorations and the sounds of holiday cheer evoke painful memories of his parents' murder and the trauma he experienced in the orphanage. A pivotal moment occurs when he is forced to dress as Santa Claus at work, which brings back the horrific memories associated with the holiday. Each encounter with the festive imagery heightens his psychological distress, ultimately leading him to lash out violently against those he perceives as threats or reminders of his past.

Is this family friendly?