Teenage best friends Lei Wing Laam and Lei Sam Yut are both high-achieving students at a traditional Hong Kong girls' school. A relationship that doesn't know whether it is friendship or love arises when Sam Yut declares her love to Wing Laam and the two start a chaste but heated romance, but reality forces the two to pursue different futures. Years later, a cruel wedding brings the two together again when Sam Yut asks Wing Laam to be her maid of honor.