Shiba Kengo is a pure-hearted young surgeon who is dedicated to his work. He gets transferred from a prestigious university hospital to a financially troubled hospital, but there he meets a capable and cool-headed chief nurse named Kasugai Yuka, who teaches him the reality of the medical world. The pure Kengo must face various obstacles and challenges as he tears off the "masks" of respected professionals - doctors, nurses, and educators - and uncovers their true natures.