Gordon Heung (Michael Miu), Senior Inspector of Narcotics Bureau's Operations Wing, is forced to partake in illegal drug manufacturing and trafficking after a mysterious man threatened to reveal his friend's illegal money laundering if he refused. Heung's good friend and student, Senior Inspector Wai Sai-lok (Raymond Lam) of Narcotics Bureau's Intelligence Wing, begins to grow suspicious of Heung after finding some evidence that hinted at Heung's illegal activities during a drug bust.

Heung's involvement with drug traffickers also gets leaked to Wai's rival, Chief Inspector Poon Hok-lai (Ben Wong) of the Operations Wing, who decides to use this chance to severe Heung and Wai's relationship. When Poon discovers that Wai had started a romance with his informant, Pat Chan (Kate Tsui), Poon gets in between their relationship and convinces Chan to leave Wai. He then indirectly forcibly exposes her to drug trafficking and consumption, and they eventually worked together to become two powerful forces of illegal drug trafficking in Hong Kong.

นำแสดงโดย Michael Miu,Raymond Lam,Kate Tsui,Ella Koon, Ben Wong, Elaine Ng