Following the events of Rance 4.2, the warrior Rance has been living as bandit leader in northern Helman. When his companion Sill is captured by the Helman Army, Rance strikes a deal with Queen Lia of Leazas — her army for his hand in marriage. Army secured and ambition unchecked, Rance's goals immediately expand beyond rescuing Sill: he wants to conquer the entire world. His first day as king provokes an instant rebellion from half the national military, and the era of Rance the Tyrant has begun.