Donna Yorke is reporting for the early shift at her office when her fellow co-worker is overcome by a strange coughing fit. This annoying symptom quickly turns into a bloody, choking convulsion that kills her in minutes. After trying unsuccessfully to help several colleagues who are experiencing the same symptoms, she moves the bodies to a far-off section of the office. Afraid to leave not knowing what she'll face outside, Donna gathers supplies and holds up in her small office with a sleeping bag, some snacks from the vending machine, and a flashlight to ward off the dark.
On the other side of the city, Jack Baxter is hiding in hi