The bros take on a hunt for [supernatural creature of your choice]! Ghosts, vampires, kitsune, the physical manifestations of your greatest fear, whatever you want.

+ Ignis is the only one who knows anything about what they're fighting. Unfortunately, Ignis is possessed/kidnapped/unconscious/otherwise unable to impart this information.
++ at one point they say, screw this let's escape and rethink our plan. They can't escape.