惠珍在九龙塘富商宋达当看护，思荷发现宋达对惠珍有所喜爱，与齐仲商谈早日换另一新人。某夜小偷入宋宅行劫，宋达见到危急关头上前，保护惠珍，最后二人打走小偷，惠珍因宋达救之有所感动，以身相许，及后宋达愿收她为妻，并答应分一份家产给她。某日，东到宋宅找惠珍，二人见面情不自禁，此时，宋达发觉二人全裸于床上，一怒之下中风昏倒，医生返魂无术。齐仲，思荷对此事十分愤怒，律师讲出一半遗产给惠珍，如有任何一方先死去，另一方可得到其它财产，思荷二人商谈急聘女杀手黑云杀惠珍，当黑云往杀惠珍之际惠珍早有准备请下保镖吕城，打斗中……

A young girl gets a job as a maid to a lecherous old billionaire. During her time there he dies, and decides to leave his money to the object of his desire, rather than his own son. His son's wife however is less than happy about this and sets in motion a chain of sexual dalliances and murder.