In the lively Wutongli neighborhood, camera-loving girl Yan Xiaoyang meets Cheng Shu, a quiet and aloof boy as reserved as a plane tree. Their story begins with an unexpected collaboration between the school's photography club and a science experiment. Through camera lenses and microscopes, they gradually glimpse each other's troubled daily lives: Yan Xiaoyang uses her camera to capture "unusual moments," while Cheng Shu seeks an outlet for his suppressed emotions among plants and piano keys.
But their peaceful routine is soon swept up in a storm. Public humiliation at a photography exhibition shatters their trust, a nursing home demolition crisis ignites tensions across the neighborhood, and Cheng Shu's mathematician father keeps up his oppressive control. Caught in the struggle to protect their home and stand up to the powerful, the teenagers are forced to grow up. The disaster that brings down the plane tree uncovers a family feud buried for two generations, and allows Cheng Shu's hidden musical talent to emerge.
Through the confusion of separation after the college entrance exams and studying far from home, Yan Xiaoyang's documentary photography is tempered by the fires of war, while Cheng Shu's talent for composition is reborn amid a family rupture. From the warmth of a neighborhood bakery to the brilliance of the world stage, they remain bound to Wutongli by its deep roots. At last, beneath a plane tree sapling symbolizing new beginnings, they perform the heartfelt "Wutong Symphony," a tribute to their homeland. The camera captures not only a wedding, but also love and devotion flourishing after wounds have healed, through the seasons...