This story is a sequel to Rocinante and the Wedding at Canterlot

Both Princess Celestia and Princess Luna know that the Crystal Empire was not the only thing banished into the frozen void. Sensing the perfect opportunity to test Twilight Sparkle's resolve and capability, Princess Celestia sends Twilight and her friends to secure the Empire from the dangers that still lurk outside its boundaries.

But while Princess Luna agrees that this is a perfect test for the young unicorn, she still has her doubts about placing the fate of an entire empire in the hooves of a single pony. Although Princess Celestia insists that Twilight must perform this task alone, perhaps Luna could call upon an old friend and his squire to serve as a form of insurance, preferably with neither Celestia nor Twilight knowing about it.