In this chapter, we learn that Dr. Rivers has been teaching the students how to use their bodies to control the flow of water. He tells them that they need to find a way to harness their bodies in order to harness the water's ability to heal them. He also tells them how they can use the water as a source of energy to help them with their tasks. He explains that the water acts as a kind of "breathing machine" that helps the students to move through the air. When they move, the water will force the air out of their bodies, and when they move again, it will force air back into their bodies.