Lucy enters a manor belonging to Coriakin, a magician. She is forced by the Dufflepuds, to seek out a spell for visibility. The swords of the seven lords are the key to defeating the mist. Once the swords are laid on Asian's Table the mist will be gone. Lucy transforms into Susan due to a beauty spell. Her dream reveals that neither Narnia nor Lucy exist. Lucy is reminded that her family only believes in Narnia because of her.
Swords are recovered as the children face dangerous obstacles. Eustace transforms into a dragon because he stole from the dragon hoard. All but one sword is recovered when the crew arrives at Asian's Table. Lilliandil comes forward, and guides them to the last Lord. Eustace becomes a sea serpent, and is hurt by the last sword. Asian transforms him back, and Eustace is sent back to Ramandu's Island with the last sword. The mist appears as the White Witch, in order to distract them. Eustace is able to place the final sword on the table. The mist dissipates. The slaves are set free when Edmund kills the sea serpent.
The children are returned home never to return again for they are grown. They enter the bedroom through the portal and hear Eustace's mother calling them.