Watch Movies2Watch. In a case of mistaken identities an unemployed thug (Yang-gu), and a doctor (Ki-min) on a career fast track; are mistaken for one another after an accident. Ki-min is thought to be murder suspect Yang-gu, and must go on the run. The thug Yang-gu excels as the Sky Doctor in a small island village. The story is a modern adaptation of the Prince and Pauper.