Ajiao looked at the sycamore tree downstairs in the dormitory. Whenever the seasons changed, she would take pictures of the tree with her mobile phone. The same angle, the same distance, and the fleeting time made it impossible not to sigh. Ajiao was looking for someone who had been in her dream. The boy who appeared in the movie, the boy who brought her joy and tears, they experienced the changes of the four seasons together, but the boy went to a distant place, and Ajiao has been waiting. Maybe he will come back tomorrow, maybe he will never come back in this life...