The fourth season of the popular medical drama starring Sakaguchi Kenji that portrays cutting-edge medical treatments in a thrilling overall package. Three years after the previous season, brilliant surgeon Asada Ryutaro (Sakaguchi) and his "Team Dragon" are back to achieve their goal of creating the perfect hospital where patients are the priority again. Two new exciting additions to the characters include Asada's former teacher (Hira Mikijiro) and a competent management consultant of the government (Takahashi Katsunori). The story in this season focuses on globalization.