Hi! I don't know how much of an in-depth story you want to go with, if there will be a massive focus on it or if it'll be more of a minimal thing but since they start off in a prison cell dungeon type thing, both your characters could be criminals or something along those lines, and you could do a something where they're put in a situation where they have to fight against other criminals who were also put in the dungeon, all after the same thing, and whoever makes it out alive with their cellmate/partner and the staff gets guaranteed freedom. It might sound silly I think but maybe if done right with stuff like deep lore and moral choices with the characters being criminals and all it could be really, really interesting