Beatrice Prior had to be the child that stayed after Caleb left her family for Erudite. Her initiation lasts only a week so her family can recover the loss of Caleb and cope with Erudite's reports. However, when she goes to the train tracks to think about the life she could have had, she meets Four , who gives her an irresistible offer: To be who she wants to become-Dauntless.