After coming back from the brink of oblivion, Twilight Sparkle awakens to the Friendship Map in ruins and to word of an assassin on the prowl. Haunted by dark visions, Twilight's perception of the world she thought she knew and her place in it is called into question, and enemies old and new seek to destroy everything she holds dear.

But how far is she willing to go to protect all she cares about?