When a mutating, highly contagious fungus escapes a sealed facility, two employees – joined by a grizzled bioterror operative – must survive the wildest night shift ever to save humanity from extinction.

Columbus has made a habit of running from what scares him. Tallahassee doesn’t have fears. If he did, he’d kick their ever-living ass. In a world overrun by zombies, these two are perfectly evolved survivors. But now, they’re about to stare down the most terrifying prospect of all: each other.