The screenplay concerns a young runaway who finds his purpose in life after hearing Heifetz play, and the kindly master of a music school in financial difficulty takes him in.

Youngster Frankie (Gene Reynolds) and his small gang commit petty crimes in their New York City tenement neighborhood, such as stealing bicycles and taking money from other boys.

One of those boys, Willy (Tommy Kelly), complains to his father about this, who takes the matter to Frankie's mother (Marjorie Main) and stepfather (Arthur Hohl).

Frankie steals his little gang's stash of spare change to buy the violin, which he handles with aplomb back in his mother's kitchen.

His stepfather comes home and believes Frankie stole it, smashes the instrument, and decides to pack him off to reform school.

Frankie overhears Peter and Ann discussing the situation, and organizes a street band with some of the other students to raise money.

When Jascha Heifetz comes out of the hall, Frankie recognizes him and tells him about the school and the fund raising concert they have scheduled.