For the past few years, Lyra has been keeping a close watch on Twilight Sparkle under the orders of Princess Celestia. Her mission: to ensure the princess's protege is emotionally stable and fit to be the leader of the Elements of Harmony.

Now Twilight has proven herself with the defeat of Discord, Lyra's mission is complete. She can finally drop her assumed identity of Heartstrings and resume her past life in Canterlot.

Or so she thought.

The princess has one final task for her, one that will uncover a conspiracy that could put the whole of Equestria under threat.

Lyra's new mission: to take down the rogue agent known as Golden Harvest.