Yoko Okouchi (Rena Tanaka) is a beautiful and bright surgeon. She is kind to her patients, but she also has a dark side. She lacks a sense of guilt and also pity for others. One day, aspiring writer Masato Nanba feels severe pain in his abdomen and goes to the hospital. There, Yoko Okouchi diagnoses Masato with appendicitis and treats him well. After his successful surgery, Masato stays at the hospital as a patient. He is happy that Yoko Okouchi is his doctor, but that will soon change.