Five extraterrestrials from the planet Zigma B, Candy, Etno, Gorgeous, Stereo and Bud go on a picnic together in space. However, their spaceship crashes into an asteroid, and they fall to planet Earth. They realise that if any human finds out that they're aliens, they could be captured and experimented on, so they take shelter in a house for rent. The aliens have two goals: Return to their home planets and chase anybody away who tries to establish themselves in the house. To remain unknown from humans, they use a device called the SMTV that lets the aliens transform into almost any entity of their choosing. It often doesn't work on the first try, leading to some wacky transformations.