The big guy has great wisdom-the big guy (Andy Lau) meets Fengyi Li (Cecilia Cheung), a policeman who comes to eliminate pornography, and the major crimes unit is also investigating an Indian murder nearby. When the big guy ran away, he ran into an escaped Indian fugitive. Finally, the escaped prisoner escaped and the big guy was taken back to the police station as a suspect. In fact, Big Guy used to be a monk in Chinese mainland. Because of the tragic death of his friend Xiaocui, he accidentally killed a bird under the tree because of grief. He meditated on the bird for seven days and seven nights, thus gaining the ability to see the cause and effect clearly-when he saw the result, he could see the reason clearly. He saw that Xiaocui's death was a cause and effect, and so was his killing of the bird. Because he could not accept all this calmly, he went to the secular world.

This time, when he saw Fengyi Li and the Japanese army killing people, he knew that her crime was too heavy and she would be devastated. In order to help this kind-hearted police flower, he began to help her secretly, and helped her solve strange cases many times to get her out of danger, hoping to help her wash away her sins. ...