ER nurse Ian saves a gunshot victim with his own rare blood. The man is Kael, a mafia boss hiding a fatal secret: hemophilia. Kael kidnaps Ian from his own wedding and offers a 3 billion won contract as his private nurse. Betrayed by his fiancée and family, Ian signs and moves in; the cold boss's clumsy tenderness makes his heart race. A dangerous contract turns into something real.
