Su Wan inherited an old and shabby rental building. The only tenant, Lin Yuan, was a weirdo who didn't pay rent and always used luminous stones to pay off the bills. Until the night when the demon broke through the seal, she picked up the mop and prepared to fight, but was blocked by the "waste tenant" who played games every day. In the blink of an eye, centuries-old demons were wiped out. He turned around and smiled casually: "Can I get a discount on the rent?" At that moment, Su Wan realized that she was taking in the Lord Demon Lord, who was feared by the entire world of cultivation.