The modern city was suddenly cut apart by the rules of the underworld. The dead did not immediately enter the underworld, but were thrown into the Temple of the Anonymous and became "people who return at night." They have to complete tasks in various folk customs, earn Yin debt, exchange Yang life, and find out the cause of their death. The further you go, the task is not just to survive, but to uncover why the entire city was written on the death list.
