Yip Ching (Yeo Vivien), Yip Kiu (Li Sze Yan) and Yip Yan (Chen Chi Yiu) are sisters. When they were young, they met a Gypsy girl (Yung Cho Yee, Joey) who foresaw that Ching would meet her true love, who has a four-leafed clover birthmark, when she turns eighteen. In the blink of an eye, the sisters have grown up and are now sixth-formers at the Greenwood International School. The beach volleyball team captain Yue Yat Sun (Szeto Shui Ki), a star student, is handsome and cheerful. Many girls join the team just for him.
The sisters see a four-leafed clover birthmark which matches the description given by the Gypsy girl on Sun from three different angles. However, Ching is indecisive and lacks confidence. Kiu and Yan are busy trying to set up chances for her to be with Sun. Remarkably, they also find the same birthmark on a bad student named Nic Fong (Choi Kay Chun)!