Unknown to the people in Tokyo, contestants enter a game called “X Game“ to win a 100 million Yen prize. Taking place in the 23 special wards in Tokyo, each contestant is given a watch. The objective of the game is then to follow the given instructions and 'cross' watches with the other contestants, before the time runs out. The last contestant still wearing the watch wins the 100 million Yen prize. Those who can't keep their bracelets will die .