Retired school principal Pak Tsin-ngam has 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. When Tsin-ngam and his friends finally find these singers, it turns out that life experiences have transformed the men into pathetic middle-aged men. They must find their youth to take the stage again.
從加國返港的退休校長白千巖，為了尋找一把腦海中浮現的女高音，重返重建的牛頭角下邨。孫女白雪兒答應他尋回昔日聖若望小學合唱團的舊生，在任職偵探社好友陸居男，以及舊生戴展亮、甘靜怡夫婦幫助下，終把其他成員陳理璋、游志雄、邵偉朝、邱德光、陸同、吳國亮找回來，重組合唱團。可是這幾位中佬，已變成對生命失去期盼的老油條！尋找女高音過程中，雪兒與居男萌生微妙感情，中佬們也尋回對生命的熱情，重新站在台上發亮發光！
