A group of kids defend their Maine vacation home from knee-high alien invaders in this adventure comedy for the entire family. When Michigan native Bethany Pearson (Ashley Tisdale) arrives home after a secret outing with her boyfriend (Robert Hoffman), her father, Stuart (Kevin Nealon), decides that it's high time for a family vacation. Packing up the car with wife Hannah (Ashley Aliens in the Attic, co-scripted by one of the writers of "Madagascar" and the Academy Award-winning "Wallace and Gromit: The Curse of the Were Rabbit", is an adventure/comedy about kids on a family vacation who must fight off an attack by knee-high alien invaders with world-destroying ambitions while the youngsters' parents remain clueless about the battle.