To pay for his best friend's surgery, firefighter Cheol Su decides to pick up a second job as a nude model. He hides his identity as a civil servant and uses his friend's name, Seong Jin, to work secretly. Coincidentally, Ji Na, a wealthy artist, is looking for a man with a burn scar on his upper body, who killed her parents ten years ago in the act of arson. After noticing the same type of scar on Cheol Su's shoulder during an evaluation, Ji Na decides to hire him as her model to see if he's the one responsible for her family's death.