Stowaways aboard a majestic ship, the kids try to blend in and find the next clue. Rhonda, Milligan, and Ms. Perumal board a dirigible to catch up to them. Mr. Benedict and Number Two do not hide their distrust from Curtain, despite his attempts to calm them. After observing the unnervingly joyful behavior of his devotees, they figure out that Curtain is using neurological techniques to create artificial happiness. Back at sea, the water polo team sneaks suspiciously towards the kids’ stateroom…