American comedian Johnny Lazar is given one final chance to break into the big time when he's employed to tour the various men's clubs and universities across the UK. But on his first gig, he happens to witness a gangland murder. Initially refusing to come forward, he relents when an E-fit of himself is released on TV. But his statement only stacks evidence against an innocent man, petty criminal Delroy Smith, while putting his own life in grave danger.