It's All Hallows' Eve and Penelope Mathers is determined to change her fate. Heading out to Blackwater Falls with her trusty camera, she has her heart set on capturing a prize-winning snap so that she can get the hell out of West Virginia for good.

But her evening doesn't quite go as planned when she chances upon an antique locket which tempts her down an overground path where she comes face to face with the jaws of death. Luckily for her the Mothman is nearby—but now Penny owes him a life debt—and the winged cryptid knows exactly how she can repay him...