Banker Fung Yan-tsang is a seasoned criminal in fraudulent activities. The righteous cat burglar Ham Siu-fo has issued a deadline for Fung to return the scammed money. Despite the obstacles put up by Fung's allies Chow Wai-pak and his stepwife Julie, Ham still manages to reclaim the money which is accordingly returned to the customers. In the process, Ham is reunited with her long-lost twin sister Katherine, Chow's daughter. Since losing her mother whose health took a turn for the worse after Chow's marriage to Julie, Ham has undertaken a chivalrous course in the footsteps of her aunt. She thwarts the scam marriage set up by Fung for Katherine and his idle son, using the servant Chu Yat-keung as bait, and exposes Fung's illicit affair with Julie. Crossing boundaries of class and wealth, the servant Chu and Katherine become man and wife. A happy Ham leaves, continuing to devote her life to the causes of social justice.
Patsy Ka Ling
as Ham Siu-fo / Katherine Chow Suk-yee
鄭君綿
as Chow Wai-Pak
羅蘭
as Julie, Chow's Stepwife
Leung Suk-Hing
as Keung's Mother
俞明
as Fung Fung-Cheuk
馮敬文
as Boss of Thugs
Lee Pang-Fei
as Fung Yeung-Chung
Yung Yuk-Yi
as Ham Siu Fo's Aunt (Hung Giu)
Chu Yau-Ko
as Village Neighbor
Lee Keng-Ching
as Village Neighbor
Heung Hoi
as Thug
Tung Choi-Bo
as Thug
