Tris is now officially a Dauntless. She is injected with a tracking device, and learns all the other Dauntless have been too – courtesy of the Erudite. When she wakes in the middle of the night, she finds the other Dauntless are controlled by a simulation program. They go out and start killing Abnegation members. Tris and Four are not under control and break away, but Tris is shot in the shoulder.