The transoceanic cruise ship "Aurora" set sail on Christmas Eve, but it carried twelve cursed secrets to the deep sea. Before the seventh night came, two perfect secret room murders occurred one after another, and the victims were both related to the jewelry robbery ten years ago. The down-and-out detective Ling Chen discovered that the passengers' boarding trajectories were intertwined like a spider web, and a non-existent travel agency was behind the scenes. What's even weirder is that the encrypted diary of a young man and woman who behaved intimately but distantly hidden the truth about the death of Ling Chen's father. When the cruise ship is trapped in the uninhabited land of the Pacific by a storm, the secret room techniques, symbiotic relationships, and ghost identities are uncovered one by one. The final truth is darker than the deep sea - everyone is just a pawn involved in the gears of fate, including the detective himself who is trying to uncover the mystery.
