The highly anticipated adaptation of Veronica Roth's best-selling YA novel takes place in a dystopian world where all of society is divided into five factions: Abnegation (selfless); Erudite (intelligent); Candor (honest); Amity (peaceful) and Dauntless (brave). Our heroine, 16-year-old Tris Prior (Shailene Woodley), has chosen the Dauntless faction which involves a lot of very scary initiation tests. The cast of actors — which include Theo James, Miles Teller, Ben Lamb, and Zoe Kravitz — all have to do all sorts of stomach-lurching things, such as jumping off of elevated trains and scaling great heights. In one scene, Woodley had to stand on a ledge to make a huge jump into her faction of choice. ''She really did stand on that ledge,'' marvels director Neil Burger. ''She's incredibly game and so adventurous. In a way, she's very Dauntless.''