When he arrives on an island paradise, Napoleon the dog orders its friendly inhabitants to help him construct a big house that gradually takes over all of the available space.
Lucy and Edmund, accompanied by their peevish cousin Eustace, sail with King Caspian through magic waters to the End of the World where they discover the world's end is only the beginning.
Ruben complains about having to write thank-you letters, return borrowed items, and admit his mistakes until he sees the advantages of less selfish behavior.