Yau Wai falls in love with a middle-aged, married dancer, Casta. He arranges a casual encounter with Casta and then dines with her. They also practice dancing in Casta's home. Casta is drunk and falls asleep in Yau Wei's arm. Casta's husband suddenly appears...有為在跳舞學校裡結識中年女子卡斯塔，對她產生愛慕之情。二人往酒吧去，她借酒澆愁，原來卡斯塔的丈夫經常冷落她。有為想討她的歡心，在朋友協助下，進行一連串特訓。二人在街上邂逅，往餐廳進餐喝酒。他們在她的家中練習舞步。卡斯塔「醉倒」，有為沒有乘人之危。她的丈夫突然出現......
