Level-Up Doctor manhwa, Growing up as an orphan, Jeong He-Jin didn't open his heart to anyone.After giving his all to become a cardiothoracic surgeon, he got into an unfortunate accident,after which he woke up not as Jeon He-Jin' but as Choi GiSeok'.And on top of that, he has to using his skills?The accident changed his fate drasticallyCan he become the Greatest Cardiothoracic Surgeon' as Choi GiSeok'?