[IMDA: PG] A group of kids defend their Maine vacation home from knee-high alien invaders in this rousing adventure comedy for the whole family. Shortly after Bethany Pearson (Ashley Tisdale) and her family arrive at their summer home, four aliens show up and enslave her boyfriend Ricky via a powerful mind-control device. While the adults are completely oblivious to the extraterrestrial threat, the kids fight to save the planet with a little help from Sparks, the one friendly alien.