The episode "Lisa's Sax" begins with a scene in the present day, where Homer is trying to find a way to cheer up Lisa, who is upset about her saxophone being broken. He decides to tell her the story of how she first got her saxophone, which leads to a flashback to when Lisa was a young child.

In the flashback, we see a younger Lisa, who is around eight years old, feeling neglected as her family is preoccupied with their own interests. Bart is busy with his own antics, and Marge is trying to manage the household. Lisa feels a strong desire to express herself through music, and she becomes fascinated with the saxophone after hearing a performance by a jazz musician on television.

Marge and Homer, noticing Lisa's interest, decide to buy her a saxophone for her birthday. They go to a music store, where they are met by a salesman who shows them various instruments. Homer is initially hesitant about spending money on the saxophone, but Marge encourages him, emphasizing how much it would mean to Lisa. They eventually purchase the saxophone, and Lisa is overjoyed when she receives it.

As Lisa begins to play the saxophone, she struggles at first but gradually improves. Her passion for music grows, and she starts to practice diligently. However, Bart feels overshadowed by Lisa's talent and begins to act out, trying to get attention in other ways. This leads to a series of comedic moments where Bart engages in various mischiefs to distract from Lisa's musical achievements.

The story then shifts to a pivotal moment when Lisa is invited to perform at a school talent show. She is excited but also nervous about the performance. Bart, feeling jealous, tries to sabotage her by creating distractions, but Lisa remains focused on her music. The night of the talent show arrives, and Lisa takes the stage, performing beautifully. The audience is captivated by her talent, and she receives a standing ovation.

After the performance, Lisa feels a sense of accomplishment and pride. However, Bart's jealousy continues to simmer, leading to a confrontation between the siblings. They argue about their respective talents and the attention they receive from their parents. This conflict highlights the underlying tensions in their relationship, but ultimately, they reconcile, realizing that they both have their own unique strengths.

The flashback concludes, returning to the present where Homer finishes telling Lisa the story. He expresses his love and support for her, reassuring her that her talent is special. Lisa feels comforted by her father's words, and they share a heartfelt moment together. The episode ends with a sense of familial love and understanding, as Lisa picks up her saxophone once more, ready to play.

In the ending of "Lisa's Sax," Lisa receives a saxophone as a gift from her father, Homer, who reflects on the memories of her childhood and the bond they share. The episode concludes with Lisa playing her saxophone joyfully, while Homer watches with pride, realizing the importance of supporting her passions.

As the episode nears its conclusion, we find ourselves back in the present day, where Homer and Lisa are sitting together in the living room. The scene transitions from the flashbacks of Lisa's early years to the present, where Homer is reminiscing about the day he bought Lisa her first saxophone. He recalls the struggles and triumphs of their relationship, filled with moments of laughter and frustration.

The camera pans to Lisa, who is now a talented young musician, practicing her saxophone. She plays a heartfelt tune, and the music fills the room, creating an atmosphere of warmth and nostalgia. Homer listens intently, his face a mixture of pride and love. He reflects on how far Lisa has come, from a little girl who struggled to find her place to a confident musician who expresses herself through her art.

As Lisa finishes her song, she looks at Homer, who is visibly moved. He smiles at her, and in that moment, they share a deep connection, understanding the importance of supporting each other's dreams. The scene captures the essence of their relationship, highlighting the bond between father and daughter.

The episode closes with a final shot of Lisa playing her saxophone, the music echoing through the house, symbolizing her growth and the love that exists within the Simpson family. Homer, filled with pride, realizes that despite the challenges they faced, their relationship has only grown stronger. The screen fades to black, leaving the audience with a sense of warmth and fulfillment, as the family continues to support one another in their individual journeys.

In the episode "Lisa's Sax," there is no post-credit scene. The episode concludes without any additional content after the credits roll. The focus remains on the main storyline, which explores Lisa's journey with her saxophone and her relationship with her family, particularly her father, Homer. The narrative wraps up with emotional resonance, highlighting the bond between Lisa and Homer as they reflect on her love for music.

Lisa is inspired to take up the saxophone after seeing a performance by the famous jazz musician Bleeding Gums Murphy. His soulful playing resonates with her, igniting her passion for music and leading her to express her emotions through the instrument.

Initially, Homer is dismissive and does not understand Lisa's passion for the saxophone. He struggles with the idea of her pursuing music, feeling it may not lead to a practical future. However, as the story unfolds, he begins to appreciate her talent and the joy it brings her.

Bleeding Gums Murphy serves as a mentor and inspiration for Lisa. His character embodies the struggles and triumphs of a jazz musician, and through their interactions, he encourages Lisa to embrace her musical talent and individuality, ultimately helping her to find her voice.

The flashback scenes provide context to Lisa's character and her relationship with her family, particularly with Homer. They reveal how Lisa's love for music has been a part of her life since childhood, showcasing pivotal moments that shaped her identity and her bond with her father.

Marge is supportive of Lisa's desire to play the saxophone, encouraging her to pursue her passion despite the challenges they face. She provides emotional support and helps Lisa navigate her feelings about her music, contrasting with Homer's initial skepticism.

In "Lisa's Sax," there are a few elements that might be considered objectionable or upsetting for children or sensitive viewers:

1. Emotional Themes: The episode explores themes of disappointment and insecurity, particularly through Lisa's struggles with her identity and her relationship with her family. These emotional moments may resonate deeply and could be upsetting for some viewers.

2. Family Conflict: There are scenes that depict tension and misunderstandings within the Simpson family, particularly between Lisa and Homer. This conflict may be distressing for younger viewers who are sensitive to family dynamics.

3. Flashbacks to Childhood: The episode includes flashbacks that reveal moments of vulnerability and sadness in Lisa's early life, which may evoke feelings of empathy or sadness.

4. Mature Humor: While the humor is generally light-hearted, there are instances of sarcasm and irony that may not be fully understood by younger audiences.

Overall, while the episode is designed to be humorous and heartwarming, its emotional depth and family conflicts may present challenges for some viewers.