Lam Wai-tung has developed cancer. In order to raise money for his younger brother, Wai-leung, to study medicine overseas, he steals some diamonds for smuggler Chiu Ying-kau. After the robbery, Wai-tung hides the real diamonds for himself and gives fake diamonds to Chiu, who then finds out and kills Wai-tung. In order to recover the diamonds, Chiu sets a scheme and makes Wai-leung a murder suspect and arranges his Japanese female subordinate, Miko, to hide him and nurse his gunshot wounds. Under Miko's attentive treatment, Wai-leung heals and they establish a profound friendship.