With a comet putting on a once in a lifetime show John is headed to his apartment's rooftop party to view it and his fling, Ashley, is bringing a surprise for him. John had his ideas on what the surprise was but when it turns out to be Delyn, Ashley's college friend, things get real wild. When they wake up with wicked hangovers to a world full of zombies, though, it's up to the survivors in the apartment building to hold out and survive as best they can for as long as they can.