Lin Qian rented a haunted house for cheap, and started a ridiculous cohabitation life with the deceased landlord Shen Xingze. This ghost roommate sticks to his principles and is thoughtful enough to leave a light on, cook meals and take care of the housework. Lin Qian gradually became dependent on her, and unexpectedly discovered that Shen Xingze did not die accidentally, but was murdered by intermediary Zhou Yi. She worked with Shen Xingze to collect evidence and finally brought the murderer to justice. Shen Xingze once disappeared to protect her, but came back again because of Lin Qian's longing and persistence. The two continued to accompany each other in a unique way, keeping each other warm in this city.