While being persued by bullies, Eustace and Jill Pole are magically transported to Narnia where Aslan has an important task for them; to seek out and find the long lost son of the aged King Caspian.

Jill and Eustace are introduced to Puddleglum who agrees to be their guide to the ruined city of the giants, but will their new found Marshwiggle friend meet his fate before they manage to get there?