The Silver Chair finds King Caspian as grown man, and quite sad as it has been ten years since his son, Prince Rilian, has disappeared.

Traveling through the wild lands of Narnia, Jill and Eustace must proceed on a perilous quest to find the Prince! On their way they find a marsh-wiggle, a race of giants, and a wicked Green Lady who has a plot to take Narnia under her control!