Level-Up Doctor

Story:

Jang Hye-jin, who was stuck in an orphanage as a child, did not open his heart to anyone else. After he gave his all to become a heart surgeon, he got into an accident, after which he woke up not as "Jung Hye Jin", but as "Choi Gi Seok". On top of that, does he have to raise his level in his specialty? The accident radically changed his fate, will he be able to become a cardiothoracic surgeon"like "Choi Gisok"?