After a night of fun, Deb wakes up in the apartment of the most attractive guy in Portland, Maine. She's thrilled but can't remember much about how she got there. Ryan, the handsome boy, only knows it was a mistake and ushers her out into a full-scale zombie apocalypse. Now, as the two try to find shelter, their mismatched relationship turns into a fight for survival as they discover that trusting someone with your heart is even scarier than trusting them with your life.