It's the yum-tastic pizza bake-off, with Purl as the expert judge. Bob is preparing his special top-secret recipe in order to beat rival competitors Zip and Pop, who keep trying to peek at his pizza. Soon it's time for the pizzas to go into the Castle kitchen ovens. Once there, head of security Bevel elaborately locks the kitchen door before accidentally sending the key flying over the castle wall. Now they need to retrieve the key and get back into the kitchen before the pizzas are ruined.