Conan Edogawa, Ran Mouri take a cruise back to tokyo from an island because Kogoro Mouri is forgotten of ship schedule. And then Ran and Conan meet Natsue Hatamoto and Takeshi Hatamoto. Member of Hatamoto family that just married. But Gozo Hatamoto, owner of Hatamoto family is angry because Ran, Conan, and Kogoro is ride they cruise. After that, Conan, Ran, and Kogoro have a dinner with Natsue and Takeshi is meet Gozo. After Gozo confront Takeshi, he is back to dinner room with a pale face. After that, Kenji Suzuki, Hatamoto servant goes to Gozo's room. He is screaming because Gozo Hatamoto is killed!
