It's just before New Year, and Frank, an overweight American tourist, has hired Kenji to take him on a guided tour of Tokyo's nightlife. But, Frank's behaviour is so odd that Kenji begins to entertain a horrible suspicion: his client may in fact have murderous desires. Although Kenji is far from innocent himself, he unwillingly descends with Frank into an inferno of evil, from which only his sixteen-year-old girlfriend, Jun, can possibly save him.

Every night, Kawashima Masayuki creeps from his bed and watches over his baby girl's crib while his wife sleeps. But this is no ordinary domestic scene. He has an ice pick in his hand, and a barely controllable desire to use it. Deciding to confront his demons, Kawashima sets into motion a chain of events seeming to lead inexorably to murder.