context quoted from the source.  
“Allowing her fish friends Mr. Baldwin and Cora to stay in her library house for the night, it seems like all peaceful slumber for Ponyville. However, Twilight notices a few of the hospital staff outside her window and since she and her friends are fully-awake now, decide to see what the trouble is.
 
The doctor tells them that they’re doing a search due to theft at the hospital. Seems somepony has been stealing their slippers and they need to act quick to find the culprit and return to calm down their outraged patients.
 
Cora, although just works as a coffee shop owner back in Freshwater, believes that this mystery can be solved with her own Cora-ific intelligence and offers to take the case and find whoever has stolen the hospital’s slippers.”