When Griddle loses her mother's family heirloom, The Golden Thimble of Theodora, she insists the castle be turned upside down to find it. What she doesn't know is that Sir Loungealot accidentally mistook the prized thimble for a useless hunk of gold which now resides in his mouth as a permanent golden capped tooth! With the help of the other knights, he must now find a way to extract the tooth before Griddle's mother, The Queen Mum, arrives for a surprise royal visit.