Dr. Rudolph Van Richten and his network of investigators have hunted and put an end to numerous creatures of the night across the Domains of Dread. But some foes are more elusive than others, and will require the aid of heroes to put an end their reign of terror and close out these open cases. A gathering of the Keepers of the Feather turns deadly when murderous birds overwhelm a seaside town. "An Unkind Nature" is the introductory adventure for the villainous wereraven, Nathaniel Hoken. and provides the basis for an extended campaign that will find adventurers aiding the Keepers of the Feather and traveling across the Sea of Sorrows and its island domains. This chapter also introduces a new magical item: Bluebeard's Tear. Content Warning: Murder, Abduction, Bird Attacks, Stormy Weather.