The Deltas search for a door or a key. They first find a set of stairs that leads nowhere, then start knocking on the walls to uncover hollow panels. Sarah then uses a UV flashlight that reveals a hidden key, and Hannah finds another door with three locks. The key does not work for any of them, but Sarah realizes that the triplets used the rule of three, because everything in the room comes in three: three doors, three keyholes, and three mirrors.

The Deltas find another door that opens to reveal a safe containing a rope. A written clue tells them: “He floats through the air with the greatest of ease, the daring young man on the […] flying trapeze” (65), so they guess that the rope must be used like a trapeze to lead to another room. The three friends go up a set of stairs to a platform and hook the rope to the ceiling. They realize that the wall on the other side of the tent must be fake, and Sarah, despite her fear of heights, decides to try swinging on the rope first.