The TV series "Good Boy" begins with the introduction of a group of former Olympic medalists who are struggling with their post-athletic careers. They face financial difficulties, short career spans, and injuries, which lead them to join the police force through a special recruitment program. This program allows them to use their unique athletic skills to tackle violent crimes and injustices.

As the story unfolds, these former athletes form a new police unit. They are tasked with addressing various criminal activities in their city, using their physical prowess and strategic thinking to outmaneuver and apprehend criminals. The team includes characters like Dong-ju, who becomes embroiled in a serious dilemma after falling into a trap set by a villainous figure named Ju-yeong, resulting in a significant injury.

Throughout the series, the team encounters numerous challenges as they work to create a more just society. They face internal conflicts and external threats, including betrayals and backstabbing within the enemy camp. Despite these obstacles, the team remains committed to their mission, leveraging their athletic backgrounds to overcome adversaries.

As the series progresses, the action intensifies, particularly in the penultimate episodes. The team closes in on their elusive villain, who refuses to surrender without a fight. This leads to a series of confrontations and battles, where the team's skills are put to the test.

In the final episodes, the team's efforts culminate in a climactic showdown with the villain. Despite the villain's empire seeming resilient, the team manages to expose and dismantle it through their combined efforts. The series concludes with the team achieving their goal of creating a better society, though not without facing significant challenges along the way.

Unfortunately, detailed episode-by-episode summaries or specific plot twists beyond these general events are not available in the provided sources. However, the overall narrative arc involves the transformation of former athletes into effective law enforcement officers, using their unique skills to combat crime and achieve justice.

I couldn't find specific information about a TV show titled "Good Boy" produced in 2025. However, there is a film titled "Good Boy" released in 2025, which is a supernatural horror movie directed by Ben Leonberg. If you are referring to this film, here is a brief summary followed by a detailed narrative:

Brief Summary: The film "Good Boy" ends with Indy, the dog, surviving after a series of supernatural events. Todd, Indy's owner, makes a sacrifice to save Indy, and the film concludes with Indy being rescued by Vera.

Detailed Narrative:

The film "Good Boy" is told from the perspective of Indy, a loyal dog who finds himself entangled in a supernatural horror story. As the narrative unfolds, Indy's owner, Todd, becomes increasingly consumed by a dark entity that haunts their home. The climax of the film involves Todd succumbing to this darkness, leading to a poignant moment where Indy must confront the loss of his owner.

In the final act, Todd's sacrifice is pivotal as he attempts to protect Indy from the supernatural forces. This act of love and loyalty underscores the deep bond between humans and their pets, a central theme of the film. As Todd's fate is sealed, Indy is left to face the aftermath, filled with grief and the need to move forward.

The film concludes with Vera rescuing Indy, symbolizing hope and a new beginning for the dog. This ending is intentionally crafted to subvert typical horror tropes, where the survival of the main character, in this case, Indy, serves as a thematic necessity to emphasize the importance of living on despite loss.

Throughout the film, the narrative explores themes of love, loyalty, and the emotional depth of the human-animal bond. The ending, while emotionally charged, leaves viewers with a sense of closure and a reminder of the resilience of life in the face of adversity.

Ju-yeong controls the city through corruption and criminal enterprises, notably selling a highly addictive drug called Candy. He partners with criminals like Leo and Drug Mom (Kim Yeon-ha) as his minions. Ju-yeong uses incriminating documents to bribe powerful figures and eliminate rival criminal organizations, including his former gangster mentor, Oh Dollar.

Dong-ju faces his worst dilemma after falling into Ju-yeong's trap, which results in a serious injury. Despite this, the series ends on a hopeful note for Dong-ju, showing him running on Haeundae Beach with a big smile, symbolizing a happy ending for his character.

After losing his ability to smuggle Candy due to a failed deal with the yakuza, Ju-yeong becomes desperate. The yakuza put a hit on him, and rival gangsters come to the city to kill him. In retaliation, Ju-yeong orchestrates a citywide blackout by detonating explosives on four trucks and later rigs a hotel sprinkler system to release a toxic chemical, aiming to destroy the city and his high-profile accomplices.

The series centers on former elite athletes who become special police officers through a special recruitment program. They form a rag-tag team that fights violent crime using the unique skills they acquired during their athletic careers, though specific characters besides Dong-ju are not detailed in the search results.

Leo (Ko Jun) and Drug Mom, aka Kim Yeon-ha (Lee Ho-jung), act as minion-partners to Ju-yeong in his drug-selling operations. They are criminals with a conscience who assist Ju-yeong in distributing the addictive drug Candy throughout the city.