One transfer and a few complex cases leads Traffic Accident Investigation Unit Chief Inspector Bobby Au-Yeung to work closely with CID Superintendent Joey Meng. Both understand and appreciate each other. Logistics company heiress Jeannie Chan believes Bobby broke up her family and hates him. Bobby once promised Jeannie’s late mother that he will be accommodating towards her, but he discovers that Jeannie is becoming increasingly close with lawyer Joe Ma and triad leader Pierre Ngo. Bobby also learns that his colleague and good friend Matt Yeung is Jeannie’s ex-lover. To guide her back to the right path, Bobby and Matt target the brothers Joe and Pierre. Bobby and Joe’s values are different and each has their own interpretation of justice. When the two men meet, a battle of wits is quietly triggered.