King Sombra, a cruel ruler of destruction and hate, almost destroyed the Crystal Empire and almost took control. Although behind this chaos is a father, a loving, but hard father. King Sombra wants his son, Prince Onyx, to take his spot in becoming a ruler, although Onyx doesn't want that he wants to travel and explore Equestria, just like any other pony. Then there is Princess Cadence's daughter, Princess Nomina is the casual air to the throne, but Nomina is curious about this one friend she wishes she could meet, although her parents won't allow it, that friends name is Onyx.