Yu Xiaobao (played by Anthony Wong) has good martial arts skills, but he is a little overwhelmed as he grows older. He runs an old-fashioned iron doctor's office. His wife died young, and he took on the role of mother to take care of his son Nicky (played by Stephen Fung) and daughter Natalie (played by Gillian Chung), but there is always a lack of harmony in the family. The brother and sister often quarrel, and the children are tired of their father's endless stories of his heroic deeds. Nicky has always liked his sister's good friend Ella (played by Charlene Choi), while Nataile's boyfriend Jason (played by Daniel Wu) is a musician. Rocco (played by Michael Wong) captured Yu Xiaobao and asked him to tell him about Dai Zilong, who harmed Rocco and paralyzed him. The brother and sister had to work together to save their father. Only then did they discover the true identities of their father, Jason and Dai Zilong, which surprised them.