Two-Bit Detective

Randy, or Pete the Paranormal as he's known by most is a private eye that specializes in missing ghouls, why your house is haunted, or killed that creature of the night. The undead families love him, but to the human side of town he's a paraiah. Who cares if a monster gets murdered? But everyone cares when runaways are being used as vessels for creatures not seen since God said let there be light.
Can he stop the mastermind behind this situation before the concert at the end of the world?