It’s a story where mafia’s son choi seungcheol’s held out for other missions in starry cold night, to easily slash one of the important people’s neck but he stopped unconsciously what he was about to do when he saw an angel or mostly what he saw in human being harassed by old men as they hover all over his weak body ready to him. And he’s struggling , his tears streaming down as he’s fighting back. 

Seungcheol noticed that day. That he still has heart and that he’s not meant to be this kind of man, when he reached out to help him but because of how he looks, the victim runs away crying as he’s scared.