On the surface, Teddy Yu (Anthony Wong) is a Chinese chiropractor and a widowed father. He claims to have a hidden life as a heroic bodyguard for retired secret agents. His son Nicky (Stephen Fung) and daughter Natalie (Gillian Chung) both learn the art of kung fu from him. One day, Rocco arrives asking Teddy for information on an ex-agent code-named Dragon but Teddy's lips are sealed. Rocco outnumbers Teddy with his four henchmen and kidnaps him. The children realize their father has been telling the truth after all! Would Nicky and Natalie be able to save their father as the time is rapidly running out...