Dr. Choi Giseok Levels Up

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 <Level Up> using his skills…?

The accident changed his fate drastically…
Can he become ‘the Greatest Cardiothoracic Surgeon’ as ‘Choi GiSeok’?