19/09/1962
Yu Kwok-Kei cannot pay his debts and disguises himself as Ma Ka-Wai, his cousin Yu Lan-Fun's fiancee. He tries to kill Lan-Fun. A fisherman saves Fun. She believes that Ka-Wai was the attacker, but she can't understand why. After Fun has been missing, her family puts an announcement in the paper. Meanwhile, Chan Lan-Fong, who just comes to Hong Kong, looks like Fun and is brought to Yu's home. Fong's habits are totally different from Fun's, and she cannot recognise the family, who thinks Fun has amnesia. Fun knows that her family has mistaken somebody else for her, so she goes back home secretly and teaches Fong her habits and customs. Fong does what Fun tells her, and the family thinks that she has recovered. Kwok-Kei has a guilty conscience, so he disguises as Ka-Wai again, intending to kill Fun/Fong. But he fails and got arrested. Everybody learns that Kwok-Kei wanted to kill Fun. Moreover, Fun's mother discovers that Fong is Fun's lost twin sister and the family is reunited.

Ho Lan
as Yu Lan-fun/Chan Lan-fong

Lam Tin
as Ma Ka-cheung

Butterfly Wu
as Mrs. Yu

Cheng Kwun-Min
as Yu Kwok-kei

Fung Man
as Kam Tai

Cheung Chi-Suen
as Kam shui

Lai Man
as Ah Ching

Lok Kung
as detective inspector

Lam Bou-kuen
as Annie

Yeung Yip-Wang
as Doctor Lam

Chow Chung
as Doctor Cheung
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