A convicted car thief and diehard Chicago Cubs fan, Jimmy Dworski (Belushi) wins tickets to the World Series. Unfortunately, he still has a couple of days left to serve in prison and the warden (Héctor Elizondo) will not let him leave and come back. With the help of other inmates, Jimmy stages a riot so he can sneak out of prison to see the game. On the way, he finds the Filofax of uptight and spineless advertising executive Spencer Barnes (Grodin), which promises a reward if it is found.