"Insurgent" continues the story of Beatrice "Tris" Prior, her adventures as a fugitive, run-ins with Dauntless traitors and a near death at the hands of Jeanine. "Insurgent" is the second book in the Divergent trilogy and begins shortly after the first book, "Divergent," concludes.
"Insurgent" begins with Tris and friends hiding at the Amity headquarters. Soon, Dauntless traitors arrive at Amity looking for the refugees, and Tris escapes the camp.
On the train out of the camp, Tris meets up with some factionless, now led by Tobias' mother, Evelyn. Evelyn wants Tris and Tobias' help to overthrow the Erudites by rallying the Dauntless to their cause. They go to the Candor headquarters to do this but are arrested.
Tris and Tobias are put to trial. After the trial, traitor Dauntless invade Candor searching for people who are Divergent. Tris is captured by the traitor leader, but she stabs him and escapes.
Tobias and Tris take a train to Evelyn and form an alliance between the factionless and the Dauntless, but Tris fears that Evelyn is using Tobias.
Dauntless begin committing suicide until a Divergent turns herself in, so Tris gives herself over to Jeanine. Jeanine experiments on Tris, but Peter rescues her. Tori kills Jeanine and believes Tris is a traitor, so Tris is sent to be tried with the other traitors.
The book ends with a video of a woman explaining why the factions were created and stating that she will join the factions under the name "Edith Prior."