After the repulsion of the Storm King's invasion, Tempest Shadow, being the only pony among the army, is not exiled from Equestria, but left behind to face the charge of treason. At Twilight's discretion, she is made an inhabitant of the Castle of Friendship, and the subject of the Princess' own tutelage on the subject of friendship, just as Starlight before her. In adjusting to her new life, friends, and drastically altered view of the world, Tempest must learn the true meaning of friendship, and the many forms in which it comes. With the support of Twilight Sparkle, Tempest works to develop the bonds of friendship, and find a new normal for herself, perhaps even one which accounts for her and Twilight's ever-strengthening bond.