When a chance encounter implants a worry into Twilight Sparkle’s mind, she uncovers an alarming secret about her, Celestia, and Luna’s legal right to the Equestrian throne: Namely, they have none.

Twilight Sparkle wants to know why she was kidnapped by aliens. Santana Guerro wants to know why a living, breathing space probe from a long-lost civilization is in his office. Both of them are going to need some answers, fast.

Seeking an answer to a plague striking the Changelings, Starlight Glimmer seeks the help of Chrysalis herself.