During one of his missions, he accidentally hurts Sister Mary (played by Choi Hiu-Yee), and he immediately brings her to the hospital. They later become friends and gradually fall for each other.

Chun (played by Ng Ngai-Cheung) is the #1 bodyguard. He is the half brother of Mike although the two never meet each other. He is hired to protect the triad head who is the target of Mike's next mission.

Finally Mike is able to kill the man. Chun swears to get him.

Having successfully killed the triad head, Mike finds his role as killer revealed by the man behind the plot. In pursuit of Mike, a cop, who is the foster father of both Mike and Chun, gets killed.

Saddened by the death of their father, Mike and Chun decides to collaborate to avenge their grief.