Meng Yun Lao, a college student originally from Hong Kong, stays at a family friend’s house and falls in love with their daughter, Hai Ni. Hai Ni is born with a serious heart defect. When she is notified that Yun Lao is heading back to Hong Kong, she suffers depression and dies. Yun Lao leads his life in despair until he meets a pop singer Hsiao Mei, who looks exactly like Hai Ni.

　　云楼（邓光荣 饰）是从台湾远赴香港念书的青年，借住在父亲的老同学杨伯伯家中。杨伯伯有一个女儿名叫涵妮（甄珍 饰），落落大方温文尔雅的她很快就吸引了云楼的注意，两人坠入了爱河。遗憾的是，涵妮拥有先天性心脏病，随时都有可能发病身亡，这让云楼的内心里始终都有一丝不安。

　　云楼的父亲向儿子谎称妻子病危，将云楼从香港召回台湾，不知其中隐情的涵妮误以为云楼想要抛弃她，一怒之下心脏病发作撒手人寰。失去了挚爱回到台湾的云楼开始自暴自弃，整日过着行尸走肉般的生活。一天，在超市里，云楼撞见了一名和涵妮有着一模一样样貌的女子。