After losing his parents at a young age, Mignon lives as a mechanic by day, and a cage fighter by night at an illegal arena. Living a life of exploitation and violence, the only person who gives him any attention is Oh Young-One, a doctor at the illegal arena.

"I'll do anything…! I… I can help you!"

Despite knowing Young-One's true identity, Mignon's pure and blind love for him causes Young-One to start slowly opening his heart. But the hellish reality that surrounds Mignon starts to shake up even Young-One's life!