Dr. Gang (2006)

Kang Dal Go, a mid-level member of a Busan gang, gets kicked out of the gang after being investigated by the police and is forced to flee for his life. Hiding out in Seoul, he gets himself hired as a doctor at a nearby hospital, where he quickly clashes with Kim Yoo Na, a dedicated and outspoken doctor who criticizes his incompetence and lack of care. Gradually, however, the former gang memberand the beautiful physician begin to fall in love in the midst of their clashes, to the dismay of prosecutor Suk Hee Jung who is also pursuing Yoo Na.