The male protagonist Wen Yu suffered from insomnia and tried many treatments but still couldn't fall asleep. In the end, he had to rely on medication. After falling asleep, a butterfly guided him to another place, where there was a little girl who often cried. At first, the male protagonist didn't care, until he met a girl who looked the same as the little girl but was completely different in reality. Wen Yu began to care about that girl, and the relationship between the two also changed dramatically.
Concept: About the two-way redemption of two strangers