This epic quest requires you to get a hold of a firefly jar and use it at the Pizza Pit. I interpreted 'use' to mean throw many firefly jars at the Pizza Pit and burn the entire thing to the ground. Well, better to be safe right?

You can find some fireflies to the west of Pizza Pit at Scenic Spot or to the south at Green Steel Bridge.

A word of warning Crustina is located inside Pizza Pit. While she is a friendly NPC if you burn down the Pizza Pit with her inside she may turn hostile and attack you. Not to worry you can hire her so she will follow you out of the restaurant.

Map credit to fortnite.gg