After an expedition to their old castle, the Princesess free two old generals prisoners in the Nowhere. Their names are White Nightmare and Dark Moon; the most powerful warriors of all times in Equestria; but also their lost parents.
When Discord founds it, he decide to join forces with Queen Crhysalis and King Flames, ruler of all dragons, to defeat the warriors before it was too late; those heartless cold-blodded killers must be stoped now than they're still on time