A Medieval Fair has come to town, and the Aldens get grandfather's permission to volunteer their time. Benny becomes a page to the Silver Knight, a top suspect when the valuable antique sword used in the fair goes missing. But the pompous King Richard, who tends to forget that he's an actor and not a real king, seems to think the sword belongs to him. And the beautiful Princess Annabel may also have something to hide. Can the Boxcar Children find...