An aunt living alone moved into a new house, and the abnormal behavior of the cabinet installation worker caught the attention of a little girl, Taozi. Suspicious marks at the bottom of the cabinet, cabinet doors inexplicably opening in the middle of the night, and abnormal cups sent by others kept her nerves taut with various doubts. Using her small wisdom to leave marks and remind her family, she cooperated with the police step by step to peel back the layers, unearthing the serial trap behind the wardrobe, bringing all the evildoers to justice, and steadily safeguarding her aunt's safety.