Police academy student Jiang Caicai, to ease her financial pressure and ignoring her friend Qi Ye's warnings about the museum's cultural relics being evil, resolutely takes on a high-paying night shift security job. On her very first night on the job, the Jade Burial Suit in the display case bizarrely comes to life, interacting with her in a local dialect. As the plot progresses, Jiang Caicai discovers that this is not a horror event, but rather an opportunity for the spirits of the cultural relics to seek help. Using her professional knowledge to assist the relics, she ultimately wins recognition and establishes achievements, jointly guarding historical secrets with Qi Ye.