"And why in the Emperor's name is there a Khornate Berserker snoring on the floor?"
-Inquisitor Carpathos

Six grim warriors from a dark galaxy torn apart by ferocious flames of war. Their hearts turned cold by decades of ceaseless slaughter. Their hopes and dreams long abandoned. Their love replaced with raw hatred.

Discord thinks it would be a "fun little challenge" for Twilight and her friends to persuade these psychopaths to befriend each other and have them embrace the magic of friendship.

What could possibly go wrong?