Shining Armor and Princess Cadance celebrate the birth of their first child, blissfully unaware that her arrival fulfills a dark, ancient, malevolent prophesy of doom. Calamitous events set into motion by Flurry Heart’s birth tear apart reality. The ground is torn asunder as sinister invaders emerge from the underworld. Ancient cults emerge from the shadows to herald the foretold arrival of their dark overlord. The Crystal Empire faces its most dire threat yet as a new, evil, and most adorable master launches her campaign to lay claim to the world to bring about a new era of unsurpassed evil.