Mork and Mindy tell Mearth he's an alien. Mearth gets upset and runs away. He's captured by a cult of Utopians and Mork and Mindy pretend to be part of the cult to rescue him.

Mork and Mindy are overjoyed when they meet Kalnik, an alien from Neptune who has also married an Earthling. Things go awry when they become suspicious of Kalnik's true intentions.