When Buster digs up an ancient arrowhead, everyone else wants to hunt for buried treasures, too. But how can Arthur become a famous discoverer of lost civilizations and stuff if his Mom won't let him dig up the back yard? In the second story, a field trip to the Medieval Fair pits Arthur's class against another led by Ratburn's super-tough mentor, Mr. Pryce-Jones. Arthur and the gang suffer defeat after humiliating defeat against the smarter, stronger competitors. Can Arthur save the day--and be crowned king?