When the aliens invade earth, 14-year-old Gracie and 15-year-old Brandon both end up alone and make a snap decision to join together in order to survive. Brandon has a plan to go to his uncle's cabin in Maine, but along the way they find Jake, a little boy with a secret that complicates everything. Gracie and Brandon will have to learn to get along and figure out who to trust if they want to keep...