Yan Shen, a former underground fighting champion, was involved in the world of Ushe after a match. He found that the rules here were eerily similar to the life and death game in the fighting arena. In order to find his sister who was also missing, Yanchen relied on his strong physical fitness and keen observation skills to escape the pursuit of the "Crying Face Man" in the Clock Pavilion, and saw through the booby trap of reflection in the Mirror Hall. In the process, he met He Sui, a girl who could predict the fragments of rules, and the two traveled together. They gradually discovered that the rules of the World of Usher are not unbreakable. Each subspace hides "loopholes" in the rules, and these loopholes seem to be related to a failed space experiment twenty years ago. As he goes deeper, Yanchen realizes that if he wants to get out alive, he must not only fight against the rules of the secret realm, but also be wary of other players who will do whatever it takes to survive.
