The first time, he met her while taking a promotional photo for the Shanghai Stray Animal Association; the second time, he met her when he took his dog to see a doctor; the third time, he met her when she was living on the street... In Huang Hui's memory, they only separated once or twice. But Ding Xiangdong always remembered that he kept chasing her footsteps. She was always moving, and no one always knew where she was going next. She always appeared again when he gave up, like a feather, which kept teasing his heart, but always made him feel uneasy.