Shiho works as a neurosurgeon at Nishitokyo General Hospital. She decides to quit her profession after hallucinating during surgery. Her ex-teacher Masayuki Kitabatake is the director at Tokyo University Hospital and he persuades Shiho to work at his hospital in the diagnosis department which consists of all female doctors. Shiho, who is more stubborn in her will to save other patients, sometimes come in conflicts with the other doctors there, but she cooperates with them to reveal a mysterious malady.