Yussel Rabinovitch, portrayed by Neil Diamond, is a young Jewish cantor and the fifth-generation in his family at the synagogue overseen by his domineering father, Laurence Olivier. Yussel's life appears set in the path of religious devotion, alongside his childhood friend and wife, Caitlin Adams. However, beneath the surface, he secretly writes songs for a black singing group. When a band member gets arrested, Yussel takes a risk by donning blackface to perform at a club, leading to unexpected complications after a patron notices his white hands. This incident escalates into a confrontation, resulting in the band’s arrest.
His father arrives to bail them out, only to discover Yussel has been performing under the stage name "Jess Robin." Their conversation reveals a deep-seated clash between Yussel's personal aspirations and his father's intentions for his divine voice, as his father insists that it should be devoted exclusively to God’s glory.
In this journey, Yussel's close friend Bubba, played by Franklyn Ajaye, informs him of an exciting opportunity for the group in Los Angeles, working behind a well-known singer, Paul Nicholas. As Yussel begins crafting a new song titled "Love on the Rocks," it becomes evident that he aspires for greater recognition, even though Rivka remains anchored to their home life. When the singer in Los Angeles expresses interest in recording the song, he faces a dilemma as both his wife and father disapprove of his ambitions. Ultimately, during his father's 25th anniversary as a cantor, Yussel is granted permission to pursue his dreams.
Upon arriving in Los Angeles, Yussel is taken under the wing of music agent Lucie Arnaz, but his expectations are dashed when the song he wrote is transformed into a hard rock rendition. Determined to retain the integrity of his ballad, he seizes an opportunity to demonstrate his original vision, earning Molly's endorsement. However, complications arise when the group is let go, causing Yussel to doubt his potential.
Back home, Rivka finds herself caught between her loyalty to her husband and the pressures from Cantor Rabinovitch, who believes she should bring Yussel back. However, on Yussel's big night, as he sings "Summer Love" and "Hey Louise," Rivka arrives and eventually meets Molly, igniting a clash of values as the concert garners enormous applause. Amidst this success, Rivka comprehends that Yussel's aspirations whisk him further away, and she chooses to step back.
Over time, as their lives diverge, Yussel confesses his feelings for Molly after a painful separation from Rivka. His burgeoning success is overshadowed by familial conflict, especially when his father confronts him about his choice to pursue music rather than family. Things come to a head when Yussel learns of his father's hospitalization, which forces him to confront old wounds. Guided by Molly’s encouragement, he reconciles with his father, leading to a touching reunion during Yom Kippur as he sings at the synagogue.
The film culminates with Yussel's heartfelt performance of "America," with his father and Molly's support, showcasing the remarkable journey of a man navigating the crossroads of faith, ambition, and familial bonds.
