Kate heads north in the forest toward the green chapel. She stops to give an old man a piece of bread, and he attempts to pull her off her horse. At that moment, Chris gallops up and fights him off. They ride on until the track becomes steep and they continue on foot. Suddenly, they both slip and falls. Kate lands in a pool of water. On its banks is the green chapel. As she heads toward it, she is attacked by a large knight who intends to chop her head off.

Gordon calls Stern in the ITC headquarters. Heading toward the control room, he sees a scale model of La Roque and other architectural drawings. At the landing site, Gordon shows Stern that one of the glass shielding walls has been damaged by the acid. It might crack when filled with water.

In La Roque Castle, Marek is met by Sir Guy de Malegant, who takes him to see the professor. The professor is working in the arsenal, grinding gunpowder. He tells Sir Guy that he is ready to give Lord Oliver a demonstration. They go to the ramparts, where the professor demonstrates how “the fire of Athenaios of Naukratis” (416) or “automatic fire” works.