Li Tianen (played by Louis Koo) liked to fight when he was a teenager, and later became a gangster. He and his mother Enma (played by Miao Kexiu) bickered with each other, which was their usual way of getting along. Chen Meibao (played by Rene Liu) and Li Tianen fell in love at first sight at the police station. Even though their backgrounds were very different, they still fell in love. But when Meibao told Tianen that she was pregnant, Tianen was like a bolt from the blue. Without a father, he didn't know how to be a father at all. Li Tianen couldn't escape the responsibility he should bear. When Tianen felt that his life was about to be trapped by his wife and children, the birth of his daughter Xier completely changed Li Tianen. Tianen tried his best to hide his gangster identity from his daughter, gave up doing crooked business, and put down his body to please his daughter for his daughter. During this period, Tianen's mother passed away, and due to the recession, Tianen's business plummeted. Seeing that several old predecessors in the society put more and more pressure on Tianen, Tianen had no choice but to accept it. Xi'er grew up day by day, and she also knew her father's identity as a gangster. Meibao hoped that Tian'en could quit the underworld, but the gang wanted to recommend him to be the leader at this time, and even threatened him with his debts. Tian'en was in a dilemma. In order to give an explanation to the gang and quit from now on, he decided to make a deal with the drug dealer, but was discovered by the ambushing police. The angry drug dealer shot Tian'en...