The East End Kids are wrongly convicted of stealing a truck and are sent to reform school. While there, the older brother of Danny (Bobby Jordan) is convicted of a murder he didn't commit and is sentenced to death. Piecing together some evidence, Muggs (Leo Gorcey) and the rest of the East Side Kids uncover the truth about the murder to prove Danny's brother is innocent. The gang must break out of reform school to track down the real killer before the death sentence is carried out.