While on a family camping trip three young siblings are lured away from their parents and held captive by a group of shape-shifting aliens. The aliens led by Shiftac, a portly alien with the ability to transform into a catfish, crashed down to earth long ago. In the crash, a very important piece of their ship was lost. Without this piece, the aliens remain stranded on our planet. The children could be the alien's only hope of returning home.