After the events of The Shadow of the Mare, Loop D'Loop takes up the cape and cowl of Mare Do Well in a bid to get more love and affection from the ponies around her. But a few careless mistakes lead to events spiraling out of control, and it's only a matter of time before she's revealed as the changeling she really is.
Loop D'Loop is a pegasus with a secret identity, and she intends to keep it that way. But when changelings attack, she has to find a new mask to wear.
After the events of The Shadow of the Mare, Loop D'Loop takes up the cape and cowl of Mare Do Well again for her own selfish reasons. But her actions have consequences and soon she's in over her head.