The story follows a talented young musician named Ritchie Valens, whose passion for music drives him to pursue a career in rock 'n' roll. Ritchie lives with his family in a poor Mexican-American neighborhood in California, where he navigates a complicated relationship with his brother Bob and supports his mother, who believes in his potential. Despite facing financial hardships and racial discrimination, Ritchie's love for music and his determination to make a name for himself propel him forward. He receives guidance and encouragement from his supportive girlfriend Donna and begins to gain recognition for his guitar skills and soulful voice. With a self-taught exuberance, he works tirelessly to refine his craft, balancing familial commitments with the burgeoning promise of a musical career.

As Ritchie's talent attracts the attention of music producer Bob Keane, opportunities open up for him, leading to his first professional recording session. He adapts to the fast-paced world of rock 'n' roll, winning over audiences with his energetic performances and heartfelt songs. However, his unexpected rise to fame strains relationships with his family and introduces him to the challenges of the music industry. Amidst an intense rivalry with Bob and the pressures of success, Ritchie struggles to maintain his humble roots while achieving his dreams. The story captures both the exhilaration of youthful ambition and the bittersweet realities that accompany it, as Ritchie strives to leave a lasting impact through his music.