Ko is a hard working doctor who has little time to spend with his wife. When she dies in a car accident her heart is given to another woman, Tse Yuen Sam. Ko later changes careers and becomes a paramedic. One night while on call in an ambulance, Ko attends a traffic accident involving Sam. He discovers she is the recipient of his wife’s heart and that her husband Derek has lefther. Ko decides to use their resemblance as a means of making amends for both his and Derek’s treatment of their wives.