The people of Pembrose have long believed that King Arthur and the sorcerer Merlin once lived near their small town. In fact, the cave where Merlin did his magic is a popular attraction for visitors. But now a handsome archeologist has come to town claiming that the cave is just a hoax, a legend to attract tourists. Minerva, Ravi, and Thomasina believe in the legend and in Merlin. Once they prove it to the scientist, the three friends can get back...