Nine-year-old Wen Zhao is a quiet child in the old residential compound. His parents spend most of the year away filming, and he always hides behind the flowerbed bench to watch ants. Even his laughter is timid. Seventeen-year-old Jiang Zhiheng has just moved in to keep his grandmother company. His school uniform is worn from washing, but his eyes are gentle. He crouches beside the bench, offers Wen Zhao a peeled tangerine candy, and softly invites him to play. That summer, Jiang Zhiheng takes him cicada-catching, teaches him the names of flowers, and shows him how to write his name. He becomes the only light in Wen Zhao's childhood. But after his grandmother passes away, Jiang Zhiheng moves away, leaving behind only a crumpled note in Wen Zhao's hand bearing the name “Jiang Zhiheng.”
Ten years later, nineteen-year-old Wen Zhao is a sought-after actor, dazzling under the spotlights. In private, however, he is trapped by childhood loneliness and the pressures of the industry, and often lies awake late into the night. At a charity event, he reunites at a middle school with twenty-seven-year-old Jiang Zhiheng. He is now a Chinese teacher, still gentle-eyed as he discusses The Book of Songs, though the burdens of family and the pressures of teaching have left him exhausted.
When old acquaintances meet again, warmth flows between them once more. Wen Zhao uses “asking about Chinese homework” as an excuse to see Jiang Zhiheng, bringing sunshine into his weary life. When Wen Zhao is attacked by public opinion, Jiang Zhiheng listens to him and teaches him how to find calm. As they piece together the bonds of childhood, they heal the wounds of adulthood: Wen Zhao escapes his loneliness, and Jiang Zhiheng rediscovers his passion. After ten years of finding their way back to each other, the young actor and the teacher finally join hands, turning regret into a happy ending and becoming each other's everlasting warmth.
