A human living in Canterlot castle is given to Queen Chrysalis as part of peace negotiations between Equestria and the Hive. Celestia knew she shouldn't have let Luna finish the negotiations herself.
After the defeat of Tirek, a special letter arrives with news from a secluded town in the middle of Nowhere. Now the main six are tasked with finding out what happened there, and who this Mister Baker really is.