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.

Jacqueline Wong, a maid in the household of the Vice Minister of War, leads an alliance of maids at the six ministries, who trade information and make money together. Roxanne Tong sold herself to be a maid to raise money for her lover to travel to the capital and take the imperial exams. Jacqueline and Roxanne take care of the Vice Minister's first wife and second wife (Angie Cheung), respectively, and fight against each other on behalf of their mistresses. Jacqueline and the young master fall in love, but they are oppressed by his father. Timothy is demoted after committing an offense. Tony is determined to achieve honors from the imperial exam and restore the family's reputation. Lisa Lau, the daughter of the Minister of War (Pat Poon), sets her eyes on Brian and tries to seduce him. Jacqueline and Roxanne worry that they will lose their lovers if they achieve a high rank in the imperial exams, and vow to ruin their scholarly dreams. As the two pairs of lovers are about to break up, they get embroiled in a treasonous conspiracy.