In this episode, Lisa works as a veterinarian intern after saving a raccoon while Marge earns extra money cleaning up crime scenes.
The Simpsons are visiting an indoor water park, but seeing that one of the main attractions has a very long line, thanks to the other kids downloading an app to receive a ticket number for the ride, Bart, who did not use the app, decides to pull a prank, announcing that the pools are infested with fish that can swim up people's private parts, and the only cure for this is to roll naked on the snow.
In the middle of the clutter, a raccoon enters the park, but one of the employees shoots the animal with a taser gun.
Wiggum also invites Marge to make other crime scenes' clean ups, as they can keep all the money and jewelry they find.
However, Nibbles dies only a few seconds after the operation, saddening Lisa as she technically killed an animal by neglecting it.
He uses reverse psychology to trick Marge into coming with him to the clinic, and she and Lisa do end up hugging each other and sobbing during their breakdown.
York previously appeared in another role in the seventeenth season episode, "Homer's Paternity Coot.