Inspector Kenmochi takes Hajime and Myuki on the Cobalt Marine, not a cruise ship, but a cargo freighter with accommodation to Okinawa. Meanwhile, Captain Kozo Takamori has received a letter from a Ghost Captain stating that the cruise of death has begun. Takamori asserts that it was sent by one of the disgruntled crew and accuses the Navigator Mikihiko Wakaouji...