Lin Ye and eight other people were trapped in a "memory-eating" watch museum. At zero o'clock every day, they had to find the exclusive room password based on the memory of other people's deaths, otherwise they would be silenced by the mechanical guards. Everyone awakens to the power of memory, but there is a price. Following the clues, they uncover the truth about the fire seven years ago - the key to escaping is to face the deep guilt. The bell on the seventh day determines whether they will be trapped in a cage forever or make peace with the past.
