Cha Do-hyun, a third-generation business heir,
suffers from dissociative identity disorder following several traumatic events.
He secretly seeks help from Oh Ri-jin, a first-year psychiatric resident, to regain control of his life.
However, Ri-jin’s twin brother, Oh Ri-on, a writer determined to expose the lives of the wealthy,
begins following Do-hyun. The series explores whether
Do-hyun can manage his seven distinct personalities before one of them permanently takes over his life.
