After his childhood friend mysteriously disappears, an unexpected incident leaves behind only one clue: a mysterious black book. Determined to uncover the truth and rescue his best friend, Mo Shouchen is forced to enter one dangerous secret realm after another. From a confined elevator trial and relentless pursuit by unknown dangers to a desperate struggle for survival on a fog-shrouded deserted island, every realm conceals deadly survival rules, with dangers lurking at every step and traps hidden everywhere. In these desperate situations, he can only rely on his meticulous reasoning, calm judgment, and the mysterious black book of unknown origins to overcome each challenge. Strange and extraordinary items appear one after another as the difficulty of each trial continues to escalate. The three trials are only the beginning. The layers of danger lurking behind everything have only just begun to unfold.