A sudden rainstorm trapped thirteen strangers in a remote mountain villa. The owner of the villa disappeared mysteriously, leaving only a strange note: "Welcome to the game, only one person can leave alive."
As time passed, strange things happened one after another: every hour, someone died mysteriously, and a playing card was always left at the scene, from A to K, as if counting down something. Fear spreads among the crowd, trust gradually collapses, and everyone may be the murderer or the next victim.
Detective Chen Mo accidentally broke into the villa while investigating an old case and was forced to get involved in this death game. He must crack the code behind the playing cards within a limited time, uncover the true identity of the owner of the villa, and the connection between this "game" and the unsolved case ten years ago...
