Chisoo tries to forget the pain in reality through the life of Hitman Flying Dagger and web novelist Black Rose. The more the organization's boss Black Rose comes to him, Gitae appears to him like a one-stemmed light.

Unknown hitman Wild Dog is feeling more and more love in Flying Dagger. He becomes happier. He does not want to miss this happiness, but Wild Dog has a secret that can not be revealed to the Flying Dagger.

Flying Dagger and Wild Dog still love each other, hiding it as a hitman, sharing common life everyday and gradually grow love. Wild Dog, however, conflicts with the instructions of the organization that he is to perform.