Yan Yuechu and his colleague Hu Zhi seek shelter from the rain in a rather unusual location after going out for late-night drinks: the structure housing Xu Aiyou's escape game, YY. Despite the game's notoriety and enigmatic owner, the pair decides to give it a shot. Yan Yuechu and Hu Zhi manage to finish the game in time with an hour to solve riddles and find their way out of a maze of unsettling rooms. The men, however, are deeply affected by glimpses of what seems to be Xu Aiyou's troubled past that are dispersed throughout the game; this impression is so enduring that vivid scenes from recent escape games start to creep into their dreams.
