When Hollywood stand-up comedian Biff Kincaid learns the comedian he's filling in for at the last minute at a comedy club was murdered, he uses his skills as an amateur detective to find out who the killer is. He uncovers a joke thief who recorded Biff's act and sold it to wealthy wannabe who plans to use Biff's material for his debut special. Another comedian would let it slide, but Biff has never backed away from a fight in all his years in the funny business, and he's not going to start now. With a pair of fists as fast as his mouth, Biff sets out to uncover the murdererbefore he's the next victim.