There's a hot new pizza joint in Bailey City and Mrs. Jeepers brings the kids there for a special treat. The castle-shaped building and medieval-style costumes on the waiters are fun, but when a rumble from the kitchen shakes the restaurant's foundations, the kids get suspicious. George, the owner, says his cook is temperamental and the earth-shaking fits he has are nothing unusual, but the kids are pretty sure the owner is St. George the dragon slayer and that his cook is a captive dragon. Can the kids uncover the truth before the disgruntled cook becomes a real problem?