Cujo was a friendly dog, lovable and loyal to his owners. But that all ends on the day this nearly two-hundred-pound Saint Bernard makes the mistake of chasing a rabbit into an underground cave, setting off a tragic chain of events. Now Cujo is no longer himself as he is slowly overcome by a growing sickness, one that consumes his mind even as his once affable thoughts turn uncontrollably and inexorably to hatred and murder. Cujo is about to become the center of a horrifying vortex that will inescapably draw in everyone around him - a relentless reign of terror, fury, and madness from which no one in Castle Rock will truly be safe.