Kiedy tajemniczy wróg atakuje jego rodzinę, członek tajpejskiej triady udaje się do Los Angeles, aby chronić swoją upartą matkę i nieświadomego młodszego brata.
Znudzeni swoim pożyciem małżeńskim Jack i Emma postanawiają wynająć prostytutkę, która doda pikanterii ich związkowi. Ich relacja jednak szybko zaczyna mieć głębszy charakter.
Chief inspector of Hong Kong’s Criminal Intelligence Bureau, Cheuk Hoi, is suspicious of his close colleague’s mysterious death. Adding to the enigma, he discovers that the five undercover agents who were in constant contact with his dead friend have all vanished.
Cheng Tian, Wei Jun Xuan, and Xu Xiu Ping grew up like brothers, and the three loyal friends join the HK Police Force together, specializing in anti-narcotics cases. While they were meant to reunite after busting a large-scale drug ring, Cheng Tian and Xiu Ping discover that Jun Xuan, who had gone undercover, has returned a changed person. Xiu Ping gets framed by a gang, pushing him to join hands with the corrupted Jun Xuan out of resentment. The drug war in South East Asia intensifies as a new generation of drug lords gain power and Jun Xuan clashes with Thai drug lords. The three friends find themselves in two different worlds and their brotherhood is put to test in the face of greed and corruption.
Ever since falling in love, former triad member Ho Keisong has put his former gang life behind to become a chef. Life is good as he and his wife make a good living at their small restaurant and their daughter works as an investment banker. But their happy family life is threatened when Keisong's former triad boss Lau Cheuknam is released from prison. Not only does Cheuknam wants to pull Keisong back into the triad life, but Keisong's marriage is also on the line as his wife was Cheuknam's girlfriend before his incarceration.
Londyński profesor dowiaduje się, że jego zona zmarła w wypadku samochodowym podczas pracy w Hong Kongu. Profesor wyrusza w podróż, by zbadać okoliczności jej śmierci.
Córka bossa triady zaczyna pracować w tajnej ochronie znanej aktorki i zakochuje się w gwiazdorze telewizyjnym.