Xue, Jiajia, and Yilu, three Taiwanese college students studying in Guangzhou, welcomed the graduation day. Faced with the choice of going back or staying, the three good sisters resolutely decided to stay and start a business together for their own ideals. The hardships of starting a business could not resist the vitality of youth, and the warm little clothing store "Sunshine Window" opened smoothly. When the joy of the first success was still lingering, someone left without saying goodbye... Faced with the sudden blow, they chose to face it bravely, and finally overcame many difficulties and won back their friendship.