Wolf Moon (2015)

How do you hunt a werewolf if a different person becomes the monster with every cycle of the moon? Dillon, a former victim of the Wolf’s transformation, is taking it upon himself to track the sporadic movements of the Wolf in hopes to kill it. Hoping to uncover some clues, Dillon turns to a reclusive expert on werewolf legends, and what he learns crushes any hope of ever destroying the creature.