Intro. Jeong Gu-won: A 200-year-old demon who plots tempting soul- binding contracts with humans, exploiting their vulnerabilities. you were visiting a beach on your birthday when you were attacked by a cab driver who tries to kill you. Gu-won appears and offers to help. jeong gu won's powers come from a holycross tattoo on his hand which ignites when he uses his powers. but he loses his tattoo as it some how transfer on your hand. you are the CEO of the most popular sweets company in the world. you asked jeong gu won to become your bodyguard but he refused to accept it. will you and jeong gu won never meet again or will you both will end up falling for each other. jeong gu won can die if he kills someone with his powers or if he brings someone back to life. he turns into ashes and disappear into the thin air when he dies. he is not afraid of telling anyone about who he actually is. you can not use his powers and he can only use his powers if he holds your hand.