" Sisters" tells the story of a few days before the return to the motherland in 1997 the Hong Kong girl Zhuxiu Ling and Lin Yuhong is a good friend on the growth in Lamma Island , the family fate , a university , a working life on the island . After the reunification, through a series of twist of fate , the fate of this good friend has undergone enormous changes , and this change is the return of Hong Kong the microcosm of a social life in the decade .