This musical biopic is based on the life of Gene Krupa (Sal Mineo), the famed jazz drummer. His Catholic parents want him to be a priest, but Krupa rebels and moves away to make it as a musician in New York City, along with his friend Eddie (James Darren). He eventually falls for a girl, Ethel (Susan Kohner). But the seductions of other women, drugs and fame -- plus a lack of a formal music education -- put a strain on his personal and professional life, and Krupa must re-examine his goals.