During her longest freight run, Nebula Dusk, and her ship's AI, SARAN, deal with the isolation of deep space travel

After almost everyone in her stable is killed by raiders, Diamond Sky sets out to find the three other survivors who escaped. With the help of her new friends, an extremely strong earth pony, and an eccentric unicorn, can she cope with her loss, find the survivors of the massacre, and learn to find beauty in the bleakest of places?