A romantic thriller about an author Ah Bo and Dr. Yeung, who seem to have the perfect marriage until Ah Bo loses her vision after a car accident. One day, Dr. Yeung travels for work and leaves Ah Bo at home for several days. Possessing a deep hatred for Dr. Yeung because of a past incident, crazed Cheng Man Yau breaks into the couple’s home, and watches Ah Bo’s every move with growing lust. Meanwhile, Dr. Yeung becomes the target of more than one enemy.