An eclectic group of characters set sail on Captain Lansen’s leaky cargo ship in an attempt to escape their various troubles. When a violent storm strikes, the ship is swept into the Sargasso Sea and the passengers find themselves trapped on an island populated by man-eating seaweed, giant crabs and Spanish conquistadors who believe it’s still the 16th century.

Crazed scientist Herbert Von Krantz has invented a device to sterilize all nuclear weapons -- and a mad herd of rival spies are desperate to get their hands on the device, including a sect of bald, turtleneck-wearing assassins.

A depressed woman, Barbara, is on the verge of suicide while a man she meets in a church and a married couple try to convince her that life is worth living.