In Montgomery County, the couple Jim and his fiancée Emilie is ready to go to work when there is an explosion of a chemical plant in the outskirts of the town.
Soon Montgomery County is in quarantine and under siege by the army and people turn into zombies. Jim and Emilie escape from the town, but they have a car accident and Emilie is seriously wounded.
They arrive in a farmhouse, but Emilie dies. Jim receives a phone call and a man named Scott invites him to move to the tobacco warehouse close to the house where he is.
Jim meets Scott and he introduces his wife Julie and the unfriendly and weird Alex "Ix". Along the days, they become friends while they wait to be rescued by the marines.