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.

A taxi driver picks up a distraught woman who not only confesses her life story to him, but ends up in bed with him! This one night interlude leads to sexual encounters between five people who are forced to face the complexities of love and sex.