Yiyi came to Xi'an to look for the memory of her late lover Wu Wu. But she unexpectedly learned that Wu Wu was still alive. After several twists and turns, the two met again and learned each other's good intentions. Wu Wu left without saying goodbye because he didn't want Yiyi to get hurt. They understood each other. Although they were in the dark, they seemed to be immersed in the warm sun. The lovers finally got married, and it was a perfect ending.