In the world of killers, there is a legend:
Once upon a time, there was a killer who terrified society. He killed people without blinking an eye. Even people in the world of killers were wary of him.
Once, he was ordered to kill a female dancer. She was really beautiful. She danced like a butterfly on the stage. He was fascinated, and he became a couple with her as an ordinary person.
However, paper can never cover fire. When the killer world found out about this, he was brutally killed.
When she found out about this, she was so sad that she committed suicide at home the next day. However, she did not die, but turned into a butterfly, called Snow Butterfly.
Although this story is very cliché, it always warns the killers that they should never fall in love with their prey.
Yueying Ziruo's father violated this taboo and was killed. A few years later, Ziruo made the same mistake again. So, what is the fate waiting for her...