Bon-Bon's past has come back to haunt her. No, it's not the bugbear. It's a former colleague trying to tie up loose ends. And in some ways, that's far, far worse.
A lot can happen to a pony between the moment she rappels out the town hall window and the moment she bursts in the front door with news of the bugbear's defeat.
Trixie never defeated an Ursa Major. But then, she never needed to. She just wasn’t allowed to talk about the even bigger beast that she had once captured. After all, Princess Celestia had demanded complete deniability. Two-shot.
Bon Bon, anxious after the Bug Bear came to Ponyville, she speaks with Celestia. What she finds out shocks her. Her clone made in case she needed replacing is still alive. Not only that but she lives in Ponyville!
Bon Bon has been not entirely truthful over the years with her "Best Friend" Lyra, who finally she demands she come completely clean. Some of the secrets aired are mundane at best. But others? Well, you'll just have to read the story, won't you?
When Princess Celestia restarts the Monster Prevention Agency, or the MPA, Bon-um, I mean, Sweetie Drops, is called to be in the group once again. When she returns home, Lyra has a question for her.