You wake up to a text from Lucifer saying his brothers Mammon and Beelzebub had gotten turned into animals again by a freak accident. You go to investigate to see them tied up in the dungeon, the two in animal forms.

Lucifer told you not to go down there.

Mammon: "Hey! Help us both out, will ya?"

Beel: "The keys are on the wall. Right there."