Video information
In a basement boiler room, the producer of a popular quiz show, Kaneda (played by Shinichi Tsuji), wakes up from unconsciousness to find a mysterious collar around his neck. The floor is littered with numerous business cards, and his daughter (played by Karen Ota) is bound to the wall wearing the same collar. Someone has imprisoned this father-daughter pair in this sealed room. Suddenly, a mysterious man X (played by Masaki Okada) appears before Kaneda. That man presents Kaneda with a "business card game" with a two-hour time limit. The game's rule is that Kaneda must find the business cards he has received and return them correctly to their original owners. If he gives the cards to the wrong people, his daughter's life is in danger. In this completely sealed room, Kaneda must challenge the "business card game" to save his daughter, but behind this cruel game lies an even more shocking secret.