The future is bleak for a troubled boy from a broken home in the slums. He runs away when his step father breaks his violin, ending up sleeping in the basement of a music school for poor children.

Jascha Heifetz
as Himself

Joel McCrea
as Peter McCarthy

Andrea Leeds
as Ann Lawson

Gene Reynolds
as Frankie

Walter Brennan
as Professor Lawson

Terry Kilburn
as Limey

Tommy Kelly
as Willie

Porter Hall
as Mr. Flower

Walter Tetley
as Rocks Mulligan

Chuck Stubbs
as Fever