Wow! The opening shows Joon His impressive martial Arts skills……but no subtitles yet. I know how Viki works. First day watch with no subtitles, next day watch again with subtitles so you get a double dose of his magic. Just awesome and amazing just to watch him at work once more. Makes me so happy. He is so staunch, relentless and dauntless and fearless. His magnificent skills are showcased in that first episode, but he is worked over first by two larger men and although he beats them he meet another larger man with even stronger skills. He almost chokes him to death but then his  Brazilian Jiu-Jitsu skills come to the fore when he is on the ground. His opponent is much larger and stronger than him and flips him even when LJG has dislocated his shoulder. He (the opponent) viciously beats him in the face injects him with a drug and throws him over the side of the high building that they have been fighting on. As he fall he has visions as the cityscape flashes before as he falls. He finds himself standing back on that building watching his killer smoking. He is puzzled and sees a woman in red standing beside him. Is this a reaper? She shows him his past and explains his purpose. She sends him back in time to his school days where he was working in a convenience store. He is amazed with his transformation. Memories of his parents flood his mind and how he mistreated them when his mum always left him breakfast when she went to work early in the morning. Then one day they die and he is sorry for his misconduct In his return to life he runs all the way home to find them still alive. He is so happy to be able to repent for his behaviours. They are amazed with his new actions. They think that they are dreaming. He vows to be a better son and person. Later at school he has a vision of his parents death. He knows the date of their death and wonders if he can stop it. Is he trying to stop them from going to work on that day but fails? So he hurries to meet them when he knows the time and place of the accident where they are killed. He gets there before the car comes and his parents appear. He remembers everything about his previous life. He had looked up all the details of his parents demised so knows exactly what happened. He goes to wait outside his parents work place for them. He walks home with them. He stops them from being hit……..or does he.
Well that what I got from it without subtitles.