After graduating from the police academy, graduates Zhang Weijie (played by Nicholas Tse) and Ni Feng (played by Edison Chen) each worked in different departments. Jie and Feng's outstanding performance in an operation was assigned to the Serious Crime Unit led by Zhang Tiemin (played by Ren Dahua), dedicated to eradicating the Ba Guan Ba La brothers. Zhang Tiemin is Zhang Weijie's biological father, Jie Yi
After graduating from the police academy, graduates Zhang Weijie (played by Nicholas Tse) and Ni Feng (played by Edison Chen) each worked in different departments. Jie and Feng's outstanding performance in an operation was assigned to the Serious Crime Unit led by Zhang Tiemin (played by Ren Dahua), dedicated to eradicating the Ba Guan Ba La brothers. Zhang Tiemin is Zhang Weijie's biological father, Jie Yi