Physicist Manabu Yukawa returns to Japan from America. Detective Kaoru Utsumi visits him and talks about a case. The case is about a popular girl in a town who disappeared…

On a massive luxury cruise ship while at sea, the loyal butler and a mysterious woman cross paths as they try to uncover a murder-mystery that occurs on the ship.

Shiino one day finds out that her best friend Mariko has committed suicide. After snatching Mariko’s urn from her abusive father, Shiino heads to Marigaoka Cape, a place Mariko always…