Seven-year-old Jiang Cheng moves into a new home and becomes playmates with nine-year-old Tong Younian next door. The lively Jiang Cheng and the quiet Tong Younian complement each other, and the two gradually grow up under the influence of each other. Many years later, Tong Younian returned from his studies, proposed to Jiang Cheng under the sycamore tree of his childhood, made a lifelong promise with a ginkgo leaf ring, and completed the transformation from childhood sweethearts to lifelong partners...
