This a remake from 2014 Korean film with the same title. A story of a gangster who is a debt collector who happens to collect money from a girl who has a sick father but she accidentally fell for her. She is willing to do anything just to please the lady to get her attention. Then one day as her father pass away the girl sees the effort of the guy to console her, a person that is willing to make her happy in her darkest moment. The girl was touched by the mana gesture and she developed feelings for him. They then begun a couple, they are happy and planning to make it better. The guy decided to change his proffesion, his willing to change for he wanted to be a change man for her. One day as he ask permission to his boss he wanted to change he,asked for a different kind of a clean job. His willing to give him but he needs to do one last dirty job without him knowing that his boss is planning something foul. He fell into the trap that make her relationship also got ruin he blames himself without telling the girl the whole truth. He spent many years in jail.
When he has freedom the first thing she did was to take revenge to the person who ever done wrong to him, so that he can explain himself to the girl. But through his range he was prisoned again for many years. He was released then trying to be a changed man. He came back really sick without telling then that he suffers from Aneurysm.The girl knew it ang willing to take care of him but it still to late, the guy then dies that's makes the story sad. He has last wish, that his father must treat her as her own.