Six people, seven years, three loves, and lifelong friends. On the first day of high school, they were still strangers who didn't know each other. Shen Ruoxi raised the camera, and in the frame was a boy wearing a white T-shirt under the sycamore tree. She pressed the shutter button, and she hid the photo for seven years. Lin Xingran climbed over the wall into the school with a bun in his mouth, and hit a boy with a cold face accurately. His button collapsed, her bun flew off, and he said: "You lose the button and we can talk about fate." Su Nian stood on the auditorium stage and read out a perfect speech. After he came off the stage, he was blocked by a boy sitting on the fire escape. He held a lollipop in his mouth and said, "That smile you just made was fake." Xu Shen, Ji Jingchuan, and Lu Yu, a basketball captain, a physics genius, and a rebellious guitarist, three boys with very different personalities, met three girls on this day. From the penalty stand under the scorching sun in military training to the five people waiting for one person at the finish line at the sports meeting, from the first shared bottle of soda during the autumn mountaineering trip to the secretly holding hands during the New Year's Eve countdown, from the guitar and books on the rooftop in the second year of high school to the make-up lessons and tears in the classroom of the third year of high school, it took the six people three years to go from being strangers to being inseparable, and then separated in the end of the world after the college entrance examination. Four years of college. Some people have saved a thick stack of train tickets in a long-distance relationship, some people stopped when they heard a familiar song on the street late at night, and some people cried for a long time to a fat cat that rolled its eyes in a high school textbook. Seven years later, in the summer, six people stood under the sycamore tree again. In the wishing bottle originally buried under the old locust tree, every word written on the six notes was related to each other. The wind came that summer and never left. This is a story about encounter and reunion.