When Alang (played by Chow Yun-fat) was young, he was an excellent racing driver and was very bohemian, but this did not prevent the rich girl Bobo (played by Sylvia Chang) from falling in love with him. Bobo married him despite her family's opposition and became pregnant. After she found out that Alang had another woman behind her back, she left in anger. When Bobo was about to give birth, Alang participated in an illegal racing and killed a policeman and was imprisoned. Bobo was deceived by his mother and doctor that his baby died, and then he went to live in the United States. After being released from prison, Alang felt guilty for his previous behavior and took his son back from the orphanage and named him "Bozai" (played by Huang Kunxuan). The father and son began to live together. Ten years later, Bobo, who already had a fiancé, returned to Hong Kong and met Alang again. After learning that Bozai was his son, he wanted to take him to the United States. Alang, who still loved Bobo in his heart, decided to fight again in the arena regardless of his age and physical condition in order to prove that he had completely changed.