! Her gift for passing is a tracking implant administered by Dauntless leaders. Tris finds out that a serum and the tracking device are all part of Erudite’s plan to slaughter all of Abnegations people as well as the divergent by putting all the Dauntless into a trance to where they themselves will not be able to control their movements and be forced to follow Erudite’s wishes. Tris and Four get found out by not being under the trance. Four is given the secret serum that controls the divergent and Tris’s mom rescues her where they almost escape, but her mom gets killed. Tris finds her father, Caleb, Marcus, and many of the Abnegation faction hiding. They decide that they have to stop the computers that are running the Dauntless’s actions. Tris’s