In the face of increasingly serious crimes, the organization of Hongkong police has become increasingly powerful and modern, and the quality of police officers has also improved. The thirteen episode of a police unit drama "energy-saving" is the description of a group of police center, in the face of criminals, but also has its own investigation and reveal the passions, through their life from. The new deputy Ouyang Jinyuan (Eddie Kwan) is an art school for young people, he first joined the squad, and the fiery detective bomb (Donnie Yen), nourishing oil calm Gan Wang (Li Chengchang) misfits, when there is a conflict, but in series with ruthless Ding wood (Ou Ruiwei) event, three the development of Freemasonry, heavy hero hero compatriots love. Policewoman Fang Jingmin (He Jiali) to bomb a iron hand in a velvet glove, a character at the beginning of the resignation but not to regard it as right, some two people around and finally strike violently since then, two people, actually set foot on the road of love. Dry them in the repeated construction work while also progress and change in feelings, Jinyuan and his girlfriend and ex girlfriend; Gan Wang Ling in a protection fee in the case (Kiki Sheung) back together. All of the restaurant owner police daughter Flora (Rain Lau) in his care and love to her from the evil side...

面对日益严重的罪案，香港警方的组织日趋强大和现代化，警方人员的质素亦不断提高。十三集警匪单元剧「干探群英」便是描写警队中心的一组干探，在他们面对悍匪时，亦有自身的喜怒哀乐，从中揭示他们的查案经过及生活情况。 　　新任帮办欧阳锦源（关礼杰）是一学院派出身的年轻人，他初入重案组，与性格火爆的探员炸弹（甄子丹）、滋油淡定的甘旺（李成昌）格格不入，时有冲突，但在辑拿悍匪丁木（欧瑞伟）的事件中，三人发展出惺惺相惜，英雄重英雄的同胞之爱。 　　女警方静敏（何嘉丽）外刚内柔，对炸弹的粗豪性格初时颇不以为然，但对其颐指气使却逆来顺受，某次两人终于大打出手，自此以后，二人竟踏上爱情之路。 　　而干探们在屡建大功之余，在感情方面亦有进展及变化，锦源与女友分手；甘旺在一次收保护费的案中与前女友玲（商天娥）重拾旧欢。众人又对警署餐厅老板女儿Flora（刘玉翠）极尽关怀爱护，令她从罪恶边...