故事讲述了在未来的芝加哥，人们被分成五大派别，分别是：诚实（Candor）、博学(Erudite)、友好（Amity）、无畏（Dauntless）、无私（Abnegation）。每一个孩子在16岁的时候都要选择一个派别加入，并经受考验。女主角特丽丝（Beatrice “Tris” Prior）正面临这样的选择，然而她与别人不同，“能力倾向测试”显示她同时具备无畏、无私、博学三种特质，是一个罕见的“分歧者”。一方面牵挂家人、一方面又有自己主见的碧翠丝做出令人惊讶的选择。同时，她的特殊身份早已引来各派人物的关注；表面和平的城市下，一个个危险的阴谋正在酝酿着，特丽丝接下来的选择，不但决定了她的存亡，更关联着无数的生命 。
Four：Run! You were hit?
Dauntless：Right there! Don't move! Drop your weapons.
Jeanine：Tobias Eaton. And you, Beatrice. I thought it was intellect I was sensing in you.
Four：Maybe you're not as smart as you think you are.
Beatrice：Why are you attacking all these innocent people?
Jeanine：Innocent people? Abnegation, if left unchecked, will destroy the faction system. Same can be said of both of you. Somebody has to stop you. If we don't, peace will be lost.
Four：It's already been lost. You destroyed it.
Jeanine：Human nature destroyed it. Those of us with the vision to see that are called upon to protect the rest. We will restore the peace. And this time, it will last.
Beatrice：And what if you're wrong?
Jeanine：Bring him with us. She's injured. Any results would be unclear. You can get rid of her.
Dauntless：All right. Get down! Let's go. Come on!
Broadcast：Additional security teams, report to mobile command level 5.
Mom：Beatrice. Okay. Okay, we gotta run!
Beatrice：You were Dauntless.
Mom：Served me well today.
Beatrice：Is dad okay?
Mom：Yeah. He led a group over to Monroe and stayed. We're gonna meet him there. Let's go!
Beatrice：Will! Will! Will! Will, stop! Stop! Stop!
Mom：Okay. Come on, honey. We gotta go.
Beatrice：I killed him. I killed him. I killed him.
Mom：Come here. Okay. Let's go find your father. Cover me.
Beatrice：No. I'll go.
Dauntless：Got it, sir!
Mom：Don't stop! Don't stop! Go!
Mom：Good. Yeah, I'm good.
Beatrice：Okay! Let's go! We're good. Mom? Mom... what is it?.Hey...Mom! Mom! Mom! Mom! Mom, no! Mom! Mom! Mom? Mom! Mom, wake up! Mom! Oh, my God, mom! Stop! Stop! I love you, mom...
Beatrice：Where's my father?
Father：Beatrice? Your mother?
Beatrice：She saved me. She saved me.
Father：Then it wasn't in vain.
Marcus：We need to leave here. Are there soldiers outside?
Beatrice：No, it's clear.
Caleb：I should have believed you.I left as soon as I realized. Why is this happening? I don't understand. Why are Dauntless fighting for Erudite?
Beatrice：They don't know what they're doing. They're under simulation. We need to wake 'em up. I need to get into Dauntless.
Father：That's a fortress.
Marcus：It's not gonna happen.
Beatrice：I can get us in there. Get ready.
Beatrice：You're not gonna like it.