患者を持たず、病院の各科から持ち込まれる標本を元に病原を確定、治療方針を定める役割を担う「病理医」。優秀だが変人の病理医・岸京一郎が、自身の鑑別を元に、人知れず患者を救っていく。
The dashingly handsome Kishi Keiichitaro is Sobokai First General Hospital's only pathologist. Described as intensely eccentric and very sharp-tongued, he is an extremely outstanding doctor. He would clash with the other party no matter who he or she is, for the sake of medical justice and the lives of patients. He is considered a nuisance by the doctors around him, but they never go against his judgments. Because he does not mince his words, he makes nothing but enemies. Rookie neurologist Miyazaki Chihiro, who works at the same hospital as Kishi, is lectured by a senior doctor Kosaka Hidetoshi every day. She has reservations about his emphasis on work efficiency but cannot refute.