She's the princess, and he swore to protect her with his life. They lied to each other's faces saying that such distraction as love won't ever come between them. But, as they went on an adventure across the kingdom that will change their life forever, they realized that love is not the one to blame.

Dua tahun setelah menikah, Sanghyuk dan Seolhyun kembali ke rumah mereka di Institut Seoul. Mereka tidak tahu hanya ada banyak bahaya yang menanti mereka disana.