The Final Will: The Family's Promise takes place in an ancient magical world where the land is divided into continents ruled by ten families, each possessing unique magical abilities closely tied to inheritance. Each family belongs to one of three factions: the First Families, the most powerful and dominant; the Second Families, who serve as intermediaries between the powerful and the weak; and the Third Families, who possess relatively weaker magic. The story begins with Deren Darkon, a young man from the royal Darkon family of the Third Families, who lives a peaceful life despite the society's hatred toward him due to his controversial family origins. After his father disappeared years ago, Deren lives under the shadow of his powerful mother, the head of the family, alongside his older brother Adrian. Deren discovers that he possesses a unique magic that has not manifested until he reaches the age of 11, when his powers are revealed during crucial moments. Deren seeks to uncover the secrets of his magic, traveling across continents and forbidden lands, confronting conflicts and conspiracies with other families vying for control of the world. On this journey, Deren will discover his family's role in this eternal struggle and uncover promises that could change everyone's fate. The intrigues and complex relationships between the families, the emotional tensions among the characters, and the truth behind the inherited magical powers form the foundation of this thrilling story.