Two knights of the Royal Guard. One, a stallion bent on getting the most out of life, and the other, a creature struggling to fit in. Since their inauguration into the force, they've grown an almost destined connection. As a group of rebels attempt to attack Canterlot Castle, their training will be put to the test as they attempt to defend the castle's dungeon containing Canterlot's most dangerous prisoner. What the knights don't know, is that from this moment onward, their eyes will begin to be opened as to who they truly are and where they came from.