圣诞节前夕,冰岛一对丧子的牧羊人夫妇,把一个半人半羊的小孩带回家抚养,羊崽给这个家庭带来了欢乐,而未知的恐怖力量正在摧毁他们。A childless couple, María and Ingvar discover a mysterious newborn on their farm in Iceland. The unexpected prospect of family life brings them much joy, before ultimately destroying them.