Watch Free Online HD Moviesjoy. When Detective Sarah takes in her troubled teenage niece Emily, she discovers a dark family secret: Emily carries the curse of the Blue Moon. As the full moon rises, Sarah is forced into a dangerous world of bloodlines, betrayals, and supernatural forces that threaten to tear them apart. Howl of the Blue Moon is a haunting supernatural crime drama that explores loyalty, sacrifice, and the thin line between humanity and the monster within.