The Crown Prince of the Kingdom of Lucis, Noctis Lucis Caelum, sets out on a journey to Caem where he is set to marry his childhood friend and oracle, Lunafreya Nox Fleuret. Taking the Regalia, the king's luxury convertible, together with his Royal Guard and friends Gladiolus, Prompto, and Ignis, the group embarks on a trip across the continent. Throughout their travels, they are confronted with various situations that test their bonds, triggering reflection on their shared past experiences. Brotherhood: Final Fantasy XV is a prequel that explores the lives and challenges of the four protagonists.