I'm sorry, I haven't read this story directly. But generally, to summarize a story, one needs to look at the main characters, the central conflict, and the resolution. Maybe it's about a person's journey to become a successor in a family, business, or some other context, with various challenges and relationships along the way.
Without having read 'The Successor' by Jerry Agada, it's hard to give a proper summary. However, in many stories about succession, there are often elements such as power dynamics. The successor may have to prove themselves worthy among other contenders. There could be a theme of growth, where the character evolves from an uncertain or reluctant state to one of confidence and competence in their new role. It may also explore the relationships between the successor and those who support or oppose their rise, and how they navigate through political, social or cultural landscapes specific to the story's setting.