Kan Yiu-yeung, Ku Ka-keung, Kiu Po-po and Kiu Tai-nam were once CTRU’s Formidable Quartet. An incorrect decision in an operation caused the breakup of their friendship. And the quartet went their separate ways. Fast-forward to the present and an indiscriminate homicide again brings the quartet together. But there are still certain unresolved issues between themselves. POTT is Counter Terrorism Intelligence Cadre’s other elite task force. Team leader Fong Kwok-hei admires Po-po and asks her to become her subordinate. Team member To Siu-jie fancies her partner Yiu-yeung and finds out Po-po is Yiu-yeung’s ex-lover, so she “starts a war”. Successive explosions happen in the city. While investigating, Po-po asks prisoner-cum-hard criminal Dr. Hong’s for help, and the process is surprisingly easy. Actually, Dr. Hong has some trick up his sleeve.
Yeung Yut Ching, an elite in the bodyguard world, is good at risk management and is the winning team in life. However, his unhappy childhood made him refuse marriage, and fate made him meet Yau Tze Ching, a clever woman who keeps breaking the rules of his life.
Since starting out more than a decade ago, painter Yiu Sheung-him has not much luck until gallery boss Fong Chi-ho and his wife Sung Wai-kei discover an old painting created by Sheung-him 18 years ago. And the couple decide to help him become famous, but Sheung-him is simply not in the mood to feel happy. A moment of vanity causes Sheung-him to forgo his principles which he has been steadfastly following. Sheung-him is also consigned to oblivion because of fame and fortune. Shum Yuet, who used to be Sheung-him’s favorite disciple, again hooks up with Sheung-him due to certain vested interests. A mysterious homicide then takes place, and the victim astonishingly turns out to be Sheung-him’s wife Chong Yui-ting. If it’s not one thing, it’s another as scenes of intrigue and deceit play out.