Gao (Andy Lau) used to be a doctor and neglected his family because he was too involved in his work. After Mrs. Gao died in a traffic accident six years ago, her heart was filled with guilt. Gao resolutely changed his job as an ambulance worker, and his life became dull and abnormal. She adhered to the principle and saved the injured Chen () while performing the task.

The appearance of Chen aroused Dan's mood ripples, and Gao was unconsciously attracted by Chen. Later, Gauguin discovered that Chen's husband Derek (Andy Lau) suddenly left home a few years ago and disappeared. Derek is a famous hair stylist in the former city, and his appearance and work are extremely busy. The woman couldn't help jumping at Chen. After a long time, her love with Chen gradually faded, and she accidentally found that Derek was very similar to herself six years ago. On the other hand, she knows that Chen is seriously ill and will die soon, so she keeps looking for Derek's whereabouts, hoping that Derek can return to Chen as a prodigal son. ......