During the course of the book, there have been tremors all summer. Near the end of the book, a big earthquake comes, having gained power by bouncing off the walls of a crystal used in an attempt to trap it. Just before, the four were out walking Little Bear, their dog, when he runs down a path and into the back of a large cave. The four and their dog are stuck underground when the earthquake begins. Daja holds the roof of their small space up by making a magical "suraku" around the space to help save them. Tris and Briar begin their own protections and Tris starts to open up air vents. However, the three of them cannot finish, because each person does not have the skill to finish. Sandry remembers her time trapped in the storage room and is paralyzed with fear when she remembers her weaving bag. She infuses it with the essences of the four and weaves their magic together, so each can complete his or her jobs.