Ching Hung finds the blood test report of Shin Tai incidentally. The father and daughter relationship between Man Yi and Shiu Tai can be proved by that report. Ching Hung is in a dilemma. Tin Chun knows this secret and he pretends to take good care to flatter Ching Hung. In fact, he is trying to search for the report. Ching Hung recognizes his pretence and she is broken-hearted. After serious consideration. Ching Hung has finally made up her mind. She sends the report to Man Yi by mail and she tries to kill Tin Chun and herself together by a poisonous cake, However, Tin Chun recognizes her plot. He is so angry that he pushes Ching Hung to fall from their flat. Besides, he makes a plot to show that it is a suicidal act of Ching Hung because she dares not to face with the prosecution of her wrong doing. On the other hand, he sets fire on the post to burn the report……