Bud is an orphan living during the Great Depression in Flint, Michigan. He believes his father is Herman E. Calloway, the leader of a famous jazz band. After facing mistreatment in foster care, Bud decides to travel to Grand Rapids to find his father. Along the way, he meets a kind man who gives him a ride. When Bud meets the band, they are skeptical but feed him and invite him to their show. However, the band leader Mr. Calloway remains distant. Bud hopes to convince Mr. Calloway that he is truly his son.