Downstairs on the 13Th Floor

An old apartment building built in the 1990s - "Building 13 of Wangjiang Garden", no one has ever lived on the 13th floor. One year, a white skeleton was found on the 13th floor. The time of death was unknown, the identity was unknown, and the cause of death was unknown. Interpol Lu Chen was ordered to investigate, and the more he investigated, the more he discovered: every resident in this building is related to this skeleton. And so does he.