Lu Li, a Buddhist social animal, accidentally inherited an ancestral house, only to find that there lived a group of mythical creatures from all realms. He is passively bound to the "All Worlds Adaptation System", and his mission is to help these "non-human" tenants adapt to modern life on earth and solve their weird troubles. In the process of solving various problems to collect rent and passively showing off, Lu Li gradually transformed from an ordinary person who just wanted to get out of trouble to the real "landlord" and "rule maker" behind the scenes of the world.
