High school teacher Lam Yiu-Kwok is in the midst of a midlife crisis. His wife, Man-Ching, has been unfaithful; his friends are reaping the rewards of successful business careers while he earns a comparatively meager salary at an unglamorous job; and one of his young students, Choy-Lam, has fallen for him. When Man-Ching leaves for a month to help her former lover, a jealous Yiu-Kwok is tempted to retaliate by pursuing an affair with Choy-Lam.
Jacky Cheung
as Lam Yiu-kwok
Anita Mui
as Chan Man-ching
Karena Lam Kar-Yan
as Woo Choy-lam
Shaun Tam Chun-Yin
as Lam On-yin
Tou Tsung-Hua
as Sheng Sai-nin
Eric Kot Man-Fai
as Wong Yui
Jin Hui Man-jun
as Lam Lui-yin
Leung Tin
as Principal Leung
Race Wong
as Mrs. Mak
Koo Tin-Lung
as Kwok's Alumnus