Stephen King's best-selling novel is brought to terrifying life in this mind-blowing thriller starring John Cusack and Samuel L. Jackson. At the Boston airport, Clay (Cusack) witnesses a scene of chaotic mayhem when an electronic signal turns hundreds of cell phone users into rabid killers. Desperate to find his estranged wife and son, Clay teams with a train driver (Jackson) to battle the horde of murderous 'phoners' as the city descends into apocalyptic madness.