After a girls' night out, endearingly awkward Deb wakes up in the apartment of the most attractive guy in Portland, Maine. She's thrilled, but can't remember much of what got her there. Pretty boy Ryan only knows it was a mistake and ushers her out the door... into a full-scale zombie apocalypse. Now, a walk of shame becomes a fight for survival as the mismatched pair discovers that the only thing scarier than trusting someone with your life is trusting them with your heart.