A scientist readies a boat after his warnings of an Earth-destroying flood are ignored. However, after the disasters reach a peak level of destruction those who maligned the scientist now turn to him in desperation, as he and other refugees look to save the world and stop the disaster using the two Supercolliders on opposite sides of the Atlantic.

An ex-soldier ventures into the Pacific Northwest to uncover the truth behind his fiance's disappearance.

When an outbreak hits, Aidan barricades himself inside his apartment and starts rationing food. His complex is overrun by infected Screamers, and with the world falling apart into chaos, he is left completely alone fighting for his life.