When Edmund, Lucy, and Eustace find themselves aboard the "Dawn Treader" in Narnia, they must find and rescue the seven lords who were exiled by the tyrant Miraz, King Caspian's uncle.
Aboard the "Dawn Treader," the royal vessel of King Caspian, Edmund, Lucy, Eustace, and the crew of the vessel search for the seven lost lords of Narnia.