It's been several years since my older sister got into a cult and went missing along with her niece. Saeko, who has lost both her job and her boyfriend, is guided by a fortune teller to board a luxury cruise ship. Surprisingly, the gathered women were forced to participate in a death game and became gambling prey! "Women walk a tightrope naked on the surface of the sea where sharks are wriggling'', "If you fall, you'll drown! Human Gondola Quiz'', and many other humiliating death games without blood or tears! And the greasy men who spend a lot of money on the game and go crazy! Will Saeko be able to survive? And what happened to her sister and her niece who got into a cult...!?