Under the locust tree in the old alley, four-year-old Lin Wan met Lu Shi - the boy who put toffee into her hand and said, "I will come next time if you are unhappy", and became the only light of her childhood. But he is always like a gust of wind, coming and going without a trace, leaving only the promise of "I will find you".
When they reunited at the age of sixteen, Lu Shi was already a young man. With their hearts fluttering at the smell of orange soda, they sealed their love with a silver ring engraved with their names. But the truth caught him off guard: he was terminally ill, could live up to forty years, and could travel through time and space uncontrollably. Lin Wan did not retreat, only said "I will accompany you" - she did not know at that time that she had become immortal and would watch alone in time.
Later, people around her left one after another, and Lin Wan's face stayed at the age of twenty-five forever, waiting in the old alley for a hundred years. Lu Shi occasionally fell back through time and space, from using crutches to cough up blood to reading letters in a wheelchair. He said "Don't wait" for the last time and disappeared without a trace.
Until the autumn of the 100th year, a childish voice came from the alley. A little boy in blue uniform ran over holding half a piece of toffee. The red string around his wrist looked like the one worn by young Lu Shi: "Sister, I saw you crying in my dream and said I wanted to give you candy."
It turns out that a hundred years of waiting has never been a one-way street. He protected her when she grew up, but now she protects his childhood, waiting for a tender reunion that turns back time.
