Ran, Conan and Kogoro saw an ad on the newspaper saying that they will be having a free trip to whoever has the thing that cannot be seen now on Japan... They went to the pier and bring a 10000 yen in old bills... They were right (thanks to Conan) and boarded the big ship.. There were 11 passengers including them three that also boarded the ship.. They met a former inspector there that Mouri knew... They also met Hattori Heiji... They were having fun then when they realized an old man named "Kanou Saizo" was also onthe ship... They checked his room but his no longer there... They went to look for him everywhere on the ship because "Kanou Saizo" was a robber who robbed a bank 20 years ago and killed an accountant.. They look for him again when a crime was commited... They found a body burning at the tail of the ship.. They realized tht it was Kanie, who went missing after going to the toilet because the corpse was also wearing a golden watch.... They suspected Kameda-san, who is sleeping on his room during that time... They went to check on him but his not there.. Conan and Heiji has suspicions about the burned corpse... After talking to each other, they went around to find evidences and clues... Conan heard a splashing sound on the water... Confused, he looked for Heiji but his nowhere to be found... After that, Kanie-san, who is thought to be dead was found dead on the head of the ship... Is he the culprit? Or it is Kanou Saizo? Or it was the other 4 guests who is on the ship?