During their routine night patrol Hijikata and Okita are attacked and kidnapped by an unknown assailant. When they wake up, the two find themselves chained together and imprisoned inside an abandoned room. As the two come to realize how bad the situation is, a creepy man speaks to them over the monitor. The man, who calls himself Jigzaw, reveals that he has placed a bomb at the Shinsengumi headquarters, and that the only way Hijikata and Okita can escape is for one to kill the other!
The condition for explosion is the unlocking of the other person's shackles.
La condición es que la otra persona 
se haya liberado de sus grilletes.
A primeira é abrir a algema no
 pescoço da outra pessoa.