In Los Angeles, a gang of bank robbers who call themselves The Ex-Presidents commit their crimes while wearing masks of Reagan, Carter, Nixon and Johnson. Believing that the members of the gang could be surfers, the F.B.I. sends young agent Johnny Utah to the beach undercover to mix with the surfers and gather information.

Four cops failed to catch a thief due to their obesity. Their boss then assigned a new mission for them; lose weight in two months or they all got fired.