Character Relationship Map: Dog Bite Dog

Characters

• Inspector Wai (played by Sam Lee) — protagonist

  A model police officer and father of Tang Wing-Cheung. Shot during the manhunt, he falls into a coma and becomes a suspect in an internal affairs drug investigation.

• Chief Inspector Sum (played by Eddie Cheung Siu-Fai) — supporting
• Tang Wing-Cheung (played by Wayne Lai Yiu-Cheung) — supporting

  Inspector Wai's son, who also serves on the police force. He was advised by his father not to become an officer.

• Internal Affairs Officer (played by Lai Chi-Wai) — minor

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Internal Affairs Officer → Inspector Wai (Professional Investigator And Subject) — The Internal Affairs investigation places Wai under scrutiny as suspicions about his conduct grow.

  Internal Affairs investigates Inspector Wai in connection with the killing at the landfill and the drug investigation involving his father.

• Chief Inspector Sum → Inspector Wai (Professional Supervisor And Subordinate) — Sum works alongside Wai during the manhunt and attempts to restrain his increasingly reckless conduct.

  Chief Inspector Sum leads the investigation with Inspector Wai and tries to keep him from making matters worse.

• Inspector Wai → Tang Wing-Cheung (Family Father And Son) — Wai is Tang's father and has tried to steer him away from police work.

  The character profile identifies Tang Wing-Cheung as Inspector Wai's son. The plot also says Inspector Wai had advised him not to become a police offi...

Story Analysis

A manhunt grows entangled with police misconduct, a threatened witness, and the collapse of Inspector Wai's understanding of his family.

Plot Progression

1. A Murder and a Troubled Investigation — A barrister is murdered at breakfast, and Sum and Wai begin searching for a suspected professional killer. The suspect escapes, while Wai's conduct and disappearance deepen concern within the investig...
2. Suspicion and the Witness — A body discovered at a landfill and Wai's admission intensify scrutiny of his actions. The police also encounter a wounded woman whom the killer appears intent on retrieving, and try to protect her as...
3. A Family Secret Comes to Light — Wai's reckless pursuit endangers the woman and his team as Internal Affairs examines his father's possible drug-dealing past. His father tells him that the heroic account of the past was false and ack...
4. The Wharf and the Final Loss — The hunt culminates at a wharf, where police try to rescue the wounded woman and capture the killer. The hostage confrontation turns violent, and Wai later learns his father has taken his own life.