When detective Lok Man (Mark Cheng) from the serious crime squad went to Thailand to handle a case, he met a pole dancer named A-Li (Teng Zixuan), who was living in prostitution. The two quickly fell in love, and Lok Man promised to return to see her the same day, but he never kept his promise. Three years passed, and a police officer was killed. The police locked on to the most wanted criminal, Lam Chao (Lee Deling). At the same time, Lok Man's son was killed in a strange way, and his wife Jia-Bi (Maggie Shiu) was frightened out of her wits, and then suffered from strange symptoms. Lok Man, who was attacked from all sides, worked with veteran detective Sum (Lin Xue) to handle the case. The experienced Sum suspected that everything was the result of the peach blossom debt that Lok Man owed in Thailand, which led to his wife and children being "cast down" by someone. Lok Man was skeptical, and followed Sum's instructions to find a magician to solve the problem. He never thought that this would make his predicament related to the Lam Chao case again...