Something has been watching them since the day they were born. On Easter Sunday, twin girls Hope and Joy Murphy enter the world under strange and unsettling circumstances. Across town, a woman collapses in terror beneath a shadow that should not exist. Years pass, but something lingers. The girls grow up in a quiet, devout neighborhood where nothing ever happens-or so everyone insists. But whispers spread. A missing girl. A man who shouldn't be in the house. Shadows that move like wings. Birds that gather, watching. Always watching. As Hope begins to notice what others refuse to see, the line between faith and fear begins to erode. What once felt like protection begins to feel like surveillance. What once felt holy begins to feel...hungry. And whatever has marked them since birth is getting closer. Roost is a slow-burning descent into dread-where childhood innocence collides with something ancient, unseen, and deeply wrong.