In contemporary times, supernatural creatures hide on the fringes of human society. Possessing great physical strength and keen senses, werewolves transform on the night of the full moon. They are organized into tribes and follow a strict hierarchy, ruled by a wolf king. The werewolves share a mystical world with vampires, witches, and other supernatural races, and have a complex relationship that includes ancient covenants as well as old-fashioned rivalries. Humans are mostly oblivious to these supernatural beings, but the delicate balance is disturbed by secret organizations that investigate on the basis of clues and seek to control or destroy the supernatural beings in order to satisfy their desire for power and knowledge.