New Heart is a medical drama, consisting of 23 episodes, that aired on MBC from December 2007 to February 2008. The series stars Ji Seong as Namkang Jin, a talented thoracic surgeon who returns to the hospital where he completed his residency, Geonam University Hospital, to work as a fellow under decorated surgeon Lee Eun-sung (played by Cho Jae-hyun). However, upon arriving, he discovers that the hospital has fallen into a state of disrepair and needs a complete overhaul.
Namkang Jin quickly realizes that the hospital is in dire need of an upgrade in terms of the quality of care it provides to patients, and he sets out to revolutionize the way that doctors and nurses treat their patients. However, he soon discovers that he is not the only doctor who is passionate about changing the way that medicine is practiced at Geonam University Hospital. He is joined in his efforts by Dr. Choi In-hyuk (played by Lee Ji-hoon), a young doctor who is outspoken, brilliant, and compassionate.
Together, Namkang Jin and Choi In-hyuk work tirelessly to improve the quality of care at the hospital, and they are supported by their colleagues and the hospital staff. Along the way, they encounter a number of obstacles to their efforts to revolutionize the hospital