Years after an accident resulted in the deaths of his wife and daughter, industrial chemist David Whitman finds himself on the body-strewn trail of Joseph Mueller, an innocent security guard who doesn't realize he is the carrier of a lethal toxin that kills anyone he touches. Whitman's desperate mission soon takes a personal twist when he discovers that his search has a shocking connection to his own life, and one man will do anything to prevent the true story from getting out.