On Nightmare Night in Manehattan, a pony is killed. This usually wouldn't attract much attention, but the victim was one of the most notorious criminals in the city. The city's protector begins her search for the killer.
The greatest superheroes of Equestria are back! Their league expands, as do the legions of their enemies but as they face darker versions of themselves, they'll have to ask themselves a question: Could it be their actions cause more harm than good?