Grandpa Zhang, a retired teacher, appears to be an ordinary old man in the community who loves to play chess, but in fact he is a master cultivator who lives in seclusion in the city after failing to escape the tribulation. Lin Xiaoxia, a high school student, often helped Grandpa Zhang to carry things, so Grandpa Zhang discovered that he had a talent for cultivating immortals and accepted him as his disciple. Strange things have been happening frequently in the community recently, and residents have nightmares one after another. Grandpa Zhang realizes that the "Nightmare Beast" is causing trouble, and there is an evil cultivator behind it. Lin Xiaoxia practiced under the guidance of Grandpa Zhang. Together with Grandpa Zhang, she set up formations in the community to drive away the nightmare beasts. She also met Jiang Chen, a young monk who was also investigating the matter, and together they protected the tranquility of the community.
