Frankie is obsessed with all things paranormal. So when folks in her small Minnesota town report seeing a large, flying man with red eyes, she suspects a Mothman is on the prowl. While legends say this creepy cryptid is a sign of ill things to come, Frankie isn't buying it. And to prove she's right, the young sleuth enlists the help of her best friend, Ruby, to track down the elusive creature. But can they handle the terrifying truth when they finally come face-to-face with the monster in the moonlight?