After a close encounter with a maniac convinced the zombies can be tamed and made into a new breed of soldier, Ally implements her plan. With only a handful of people left from her group, they make the trek to the coast where they find the rusting metal hulks of what used to be grand floating cities. When they board them, they discover they are not alone. Forced to make a choice between the lives of those she cares about or death, she does the only thing she can. Ally forges a shaky alliance with a man she doesn’t trust, but it will get her one step closer to her goal. The voyage is filled with peril and danger, but they reach their destination. Midway Island. Soon after, they discover there is something deadlier than zombies. As their time ticks away, Ally's strength, determination, and will are tested.