Tris and Tobias have changed families. Tobias and Caleb are brothers, while Tris is Marcus' daughter. Caleb and Tris are both best friends and have been for years, and in secret, Tobias and Tris are dating. But now as the summer ends, it's Tobias' turn at the Choosing Ceremony. Will he stay? Or will he leave? And what happens to Tris?