Tris is more careful but still excels at training, getting through her simulations faster than anyone else. By the end of stage two, she is ranked first among the initiates. Other initiates become jealous, and three of them, including her friend Al, kidnap her and try to kill her. Four saves Tris before she is thrown over a ledge.
Tris and Four draw closer together, and Four takes Tris into a simulation of his fears. Tris discovers that Four only has four fears, hence the nickname. Most initiates have an average of 10 to 15. She also discovers that he is actually Tobias, the Abnegation leader's son and an Abnegation transfer. Four's greatest fear is of his father beating him and locking him in a small closet. After the simulation, Four takes her to the rapids where he tells her that he likes her, and they kiss.
The next day, Tris is disappointed that Four treats her like everyone else in her group. She fails a simulation, and he scolds her. Tris runs away to the Erudite headquarters in search of her brother. She tells Caleb about their mother's visit and asks him to research the simulation serum. Caleb is afraid for Tris. He feels something big is going to happen, but he doesn't know what it is. The Erudite are not happy with the government under Abnegation. As she tries to leave, Tris is arrested and taken to Jeanine, the Erudite leader, who questions her about choosing Dauntless and about her training records. Jeanine developed the serum aptitude tests and simulations, and she is suspicious of Tris' results. Tris tells her that she transferred to Dauntless because she hates Abnegation and her parents. She is allowed to return to the Dauntless compound.
Four explains to Tris that they must keep their relationship a secret or other initiates will think her rank is based on favoritism and not merit. He also tells her that he got into the Dauntless computer system and found war plans from the Erudite. They realize that the Erudite want to use the Dauntless as soldiers in a war against Abnegation.
Tris passes her final test in the Dauntless initiation, a virtual simulation of all her combined fears, and receives the top rank. Afterward, Eric, the Dauntless leader, injects her with what he says is a tracking serum. He tells her that all the Dauntless are getting it as a precaution.
