During the Tomb Sweeping Day, Lin Chen, the youngest criminal profiler of the city bureau's serious crime unit, returned to his hometown to visit his mother's grave. A strange fog involved Lin Chen and twelve strangers in a haunted house from the Republic of China a hundred years ago - the "Paper Maze."
The rules are simple: among the thirteen people, one of them is a ghost. Find him and survive.
"There is no seamless crime in the world, whether it is human or ghost."
Lin Chen wiped off the blood on the scalpel and looked around at the trembling people: "Now, let me see, who among you is lying?"
