The King's Ransom

A vision of the future gave King Aldous of Proster the strength of heart to allow himself to become King Casimir’s prisoner.
Now five years later, King Casimir is offering King Aldous his freedom in exchange for the downfall of Crown Prince Garibold, Aldous’s son.
Has five years of solitude given Aldous the strength of character to save his kingdom, people, and son from the hand of Jarlath, the warmonger?