 When boxer Murray Ritchie (Waddington) is framed for rape, he loses his chance of a long-awaited title fight. Released too late by the police, he blames Jack (Bell), his veteran trainer and manager, and goes over to rival promoter Tony Farrington (Convey). Needing the money, Murray is encouraged to turn to the rough and seedy unlicensed circuit for a fight that would see him banned from professional bouts.