Black Deer is a Navajo guide who aids Marshal Wade Norman on his hunt for notorious bank robbing brothers Jeb and Hank Norton, Throughout the journey, Black Deer warns Wade about a bloodthirsty skinwalker (werewolf) who comes out during a blood moon. Later in the film, Black Deer is revealed to be a witch, but she also revealed that she is also a half human, half skinwalker. She stated that she has the ability to transform into a werewolf hybrid when her bestial side becomes difficult to control, and that her kind is hunted by both humans and werewolves. Wade concluded that Black Deer needed the white ash, which is deadly to skinwalkers, to protect herself. At that moment, Black Deer turned heel and transformed into a werewolf, growing long claws through her fingers and showing bestial facial features. Black Deer cemented her villainous turn and howled at the moon before she attacked Wade, but she escaped before he could shoot her with silver bullets. In the end of the film, the evil Black Deer is shown in her human form hiding from the skinwalkers.