A comment made in the guest book by one of the teenagers leads him to a particular videotape. When he watches it, instead of a movie he finds an odd collection of disparate images with a portentous message at the end: Those who have viewed these images are fated to die at this exact hour one week from now. Asakawa finds himself in a race against time -- he has only seven days to find the cause of the teenagers' deaths before it finds him. The hunt puts him on the trail of an apocalyptic power that will force Asakawa to choose between saving his family and saving civilization.