Night shift security guard Lao Wang patrols an old residential complex late at night, and always bumps into a white-haired ghost wandering in the hallway. Thinking he encountered paranormal oddities at first, who would have known this ghost teacher had no malicious intent, but was just trapped in this place, and always caused all sorts of hilarious misadventures. One person and one ghost go from mutual fright to being forced partners, staging a series of down-to-earth and hilariously funny residential complex daily routines in the hallway and basement. Strange occurrences keep happening, comedy points are maxed out, and a joyous story of a security guard and a ghost begins right here.