Our food isn't killing us; it's changing us, turning us into killers. For decades scientists have used viruses and bacteria to insert rogue genetic code into our food. Now human DNA is mutating. Switches are being flipped. Some will commit suicide; others will become homicidal maniacs. One family. A mother in the custody battle of her life. A college graduate whose experiment foreshadows a grisly future A teen whose final exam won't be in English but in survival Separated by miles. Desperate to reunite. When all hell breaks loose, every block is a gauntlet.