A mysterious figure, living in shadows, is attacking seemingly random crime leaders and leaving little to no trace. The Mane Six investigate, but they find a secret more startling than what they had ever imagined.
After the events of Sundered Universe, Burning Star tries to settle down and relax by going to Shadow Armor's wedding. But, when a wicked warlord attacks and kidnaps the royalty of Equestria, its up to him and his allies to strike down Black Sun!