Through the neon-lit side streets and sprawling markets of Hong Kong, an incredible story unfolds of loyalty and betrayal. A brutal war between gangs, a young brother and sister are kidnapped and their parents brutally murdered. Yuan becomes a fighter in Bangkok's back streets whilst Maggie is trained from childhood as an assassin by her mentor Sam, a Triad hit man. Both begin to question their own motives as they are sucked into one of the world's most fearsome criminal organizations, the Triads. Hunted by the police in the melting pot of death, deception and treachery, with both believing the other is dead, they are thrown together from apposing sides, the outcome will be revenge.