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.

Flying Dagger and Wild Dog is in love, despite both hiding their identity to each other as a hitman, sharing common everyday life and gradually falling more in love. Wild Dog, however has a bit of conflicts performing his task with the organisation.

Flying Dagger and Wild Dog. They are two people who must inevitably carry out the orders of their respective organizations. In the end, their reality come cashing down and they are forced to expose each other's identity

Realising their feelings for each other is true love, Flying Dagger and Wild Dog dream of a new life that eventually will inflict the last wound. However, the organization sees them as traitors. Could the two keep their love and live a normal life until the last day?