After an experimental germ weapon is accidentally released in a small Iowa town, both citizens and soliders try to contain the virus which makes its carriers homicidal.
"A mysterious toxin in a town's water supply turns everyone exposed to it into mindless killers and the authorities leave the uninfected to their certain doom. The residents of this picture-perfect town begin to succumb to an uncontrollable urge for violence and the horrific bloodshed escalates into anarchy. In an attempt to contain the epidemic, the military uses deadly force to close off access into or out of town, abandoning the few healthy citizens to the growing mayhem as depraved killers lurk in the shadows. Sheriff David Dutton and his pregnant wife, Judy; Becca, an assistant at the medical center; and Russell, Dutton’s deputy and right-hand man, find themselves trapped in a once idyllic town they can no longer recognize. Unable to trust former neighbors and friends, deserted by the authorities and terrified of contracting the illness themselves, they are forced to band together in a nightmarish struggle for survival."