The story takes place in a closed ancient city called "Qianji Ghost City", where a "Shura Bureau" is opened every ten years. When Shen Li woke up, he found that he had lost part of his memory. He only remembered that he was a top spy and his mission was to lurk. She and ninety-nine other "players" with different backgrounds are trapped here, and must follow the cruel rules set by the mysterious "Ghost-faced Judge": a round of puzzle solving and fighting every three days, and only the last surviving person can take away the legendary "Immortality Gu" and leave.
In order to survive, Shen Li used his extraordinary observation skills and disguise skills to carefully deal with various forces. She had to form an alliance with the most dangerous man - Xiao Qianye, the leader of the Demon Cult. In an ancient city full of traps and ghosts, the two use each other, test out their trump cards, fall in love and kill each other. Shen Li gradually discovered that this game was not only killing, but also a huge conspiracy, and her lost memory contained the key to destroying this "game".
