One hundred years ago, the war that swept the world caused almost all countries to disappear from the earth, and the surviving humans gathered in the ruined Chicago. In order to seek permanent peace, the founder of the new world divided the survivors into selfless, honest, fearless, friendly and learned factions. Each faction has its own special social responsibilities, and they work together to promote the progress of this world. The beautiful girl Beatrice (Shailene Woodley) was born in a selfless family. Like other people of the same age, she will decide her lifelong faction at the age of 16. However, the test shows that she is an extremely rare divergent person. Beatrice resolutely chooses the fearless faction despite the dissuasion of the tester. In this warrior group, she must undergo the most rigorous training with her partners. And the secrets she holds will also become an important factor affecting her life...