Sandy candidates from the United States to a girls' home in Hong Kong when the tutor . She was responsible to teach the Yuen Woo-ping , Liu Min children , Chen Eqin , no brains , four girls committed . From home visits , she learned about the life experience of these four girls . Mina and Eqin Sandy 's help over a new leaf . Yuen Wo Ping, the original Sandy 's half- sister . Peace in order to help the brain also usury to take the risk of drug trafficking , fell your profit fiscal hands , Sandy through the police rescued the peace and no brains , since then they listen to Sandy , then turn over in the female Tongyuan An heart .....