Beatrice and Tobias met when they were just 8 and 10. As they grew up, they loved each other. And then Tobias left Beatrice for Dauntless, after they promised each other a forever. Beatrice picks Dauntless, determined to find Toby again, but as she finds herself falling deeper and deeper for her instructor, Four, what is she going to do? Continue her search, or give in to love?