Retired school principal Pak Tsin-ngam (Chung King Fai) has somehow returned to Hong Kong from Canada. He goes to the familiar location of Lower Ngau Tau Kok Estate, which has been redeveloped, to look for certain sopranos whose voices keep resonating in his head. Pak Suet-yee (Jacqueline Wong), his granddaughter and reclusive illustrator, promises him she is going to find those alumni who were members of St John Primary School Choir more than forty years ago. Luk Kui-nam (Nam) (Owen Cheung), detective agency employee and Suet-yee’s buddy-cum-fake husband, offers his help to divorcee Suet-yee. Alumni Tai Chin-leong (Forte)(Hugo Ng) and Kam Ching-yee (Mimi Kung) and her husband are also willing to help. They eventually manage to find other members, namely, Chan Lee-cheung (Wong Ho) (Ram Chiang), Yau Chi-hung (Wanderer) (Joe Cheng), Shiu Wai-chiu (Chiu) (Sam Tsang), Yau Tak-kwong (Brother Blue) (Willie Wai), Luk Tung (Au Siu Wai) and Ng Kwok-leung (Dark) (Tsang Wai Kuen). They also complete the original lineup by finding music teacher Lui Choi-kam (Lo Koon Lan). It is a choir reunion. However, challenging life experiences have transformed the guys into pathetic middle-aged men. During the search for the sopranos, subtle changes occur in Suet-yee and Kui-nam’s relationship. The old guys are eventually revitalized. They are going to be in the spotlight by taking center stage again!
A mysterious underworld force is engaging in criminal activities in Hong Kong, causing the city’s public safety to become a high-priority issue. SDU Chief Commander Lok Ka-shing (Michael Miu) is authorized by the commissioner to set up a task force designated as A Team, which is to be made up of exceptional police officers. Team members include Operation Unit Head Wang Kwok-dong (Bosco Wong), Investigation Unit Head Cheung Man-lung (Ron Ng), Intelligence Unit Head Ting Ho-yin (Kenneth Ma) and Identification Unit Head Yiu Ka-nam (Jennifer Yu). A Team swings into action and looks into a logistics company with underworld connections. They find out a mastermind by the name of Au Yeung Ching, who is also a tycoon, uses some underground website for conducting virtual currency transactions to facilitate his collaboration with some international crime syndicate. Vietnamese Chinese Ho Chun returns to Hong Kong and wants to be Au Yeung Ching’s partner. But nobody really knows this person. He is also allegedly to have something to do with the truth about an appalling smuggling case that took place in the 1990s in Hong Kong. The fearless A Team members not only have to confront international fugitives but also have to face up to dilemmas over love, hate and conscience in their personal relationships.
一伙神秘的黑勢力在香港進行犯罪行為，城市安全問題箭在弦上。香港飛虎隊隊長駱家成 (苗僑偉飾) 在處長的授意下，從警界挑選精英，成立特別行動組A team, 隊員包括行動組組長汪國棟（黃宗澤飾）、調查組組長章文龍（吳卓羲飾）、情報組組長丁浩然（馬國明飾）、 鑑證組組長姚嘉楠（余香凝飾）。A team從黑幫背景的物流公司入手，查到幕後莊家富商歐陽正，透過以虛擬幣交易的地下網站，與國際犯罪組織合作。越南華僑賀進回到香港，欲與歐陽正合作，但此人身份成謎，背後還牽涉到90年代香港轟動一時的走私案的真相。將生死置之度外的A team除了要與國際罪犯做出對抗，亦要面對自身的愛恨糾葛與人性抉擇。