Brash hoodlum Tom Connors enters Sing Sing cocksure of himself and disrespectful toward authority, but his tough but compassionate warden changes him.
Johnnie learns crime from petty thug Frank Wilson. When Wilson kills a pawnbroker with a gun stolen from Johnnie's sister Madge's fiance Fred Burke, Fred goes to Sing Sing's death house. Wilson uses all the pressure can to keep Johnnie silent, even after he and Johnnie themselves wind up in the big house.
A gangster is unable to go straight after returning home from prison.
