At the airport, the pilot of the plane they saw earlier asks them for help in fueling his plane up again. They decide to head for the airport to seek rescue. The survivors seek temporary shelter in a greenhouse, when they see an airplane fly overhead. Unfortunately, the Slaters take the survivors' guns and abandon them in the nearby city of Newburg, which is burning up in some areas. They make their way through Riverside to a boathouse, where they use a radio to call John and Amanda Slater to rescue them in their fishing boat. After he succumbs to the infection, the door unlocks and the survivors kill him.

The 'church guy' rings the bell and calls a horde. They enter Riverside through a church where a crazy man won't let them in his safe room.

A destroyed bridge at a turnpike on the way to Riverside forces the survivors to fight through infected zombies again. They crash in nearby Whitney County, and from there cross a bridge on foot to a truck depot, where they take a truck and drive towards Riverside. Unfortunately, the pilot becomes infected and Zoey must shoot him. They make their way to Mercy Hospital, where the infection is suspected to have started, and are rescued by a news helicopter. Bill, Louis, Francis, and Zoey find themselves stuck in the city of Fairfield, Pennsylvania in the middle of an epidemic known as the Green Flu.

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