In the kingdom of Grannzreich, a royal tutor, a prestigious position reserved for the very best educator, is entrusted with shaping the princes' education. Heine Wittgenstein, a man with a youthful appearance, is appointed by the king to teach four out of the five princes, all of whom have driven away their previous tutors. With a determination to mold these young royals into worthy successors to the throne, Heine embarks on this formidable mission. As Heine meets the princes, their composed facades crumble, revealing their distinct personalities: Leonhard, the haughty prince, rejects the idea of tutoring; Bruno, the aloof prince, questions Heine's competence; Licht, the flamboyant prince, simply follows his older brothers' lead; and Kai, the reserved prince, remains indifferent. Undeterred by their initial reactions, Heine remains resolute in guiding his challenging charges towards growth and learning, despite their resistance.