On a remote Scottish island, a meticulous police officer, Inspector Edward Malus, receives a report about the disappearance of a girl named Rowan. When he arrives on the island, he realizes that the community is immersed in ancient pagan traditions and strange rites that challenge his logic and common sense. As Malus begins to ask questions, he encounters a culture deeply rooted in agriculture and fertility, with each answer leading him to more enigmas.
The islanders, led by a charismatic and enigmatic female figure, seem more interested in preserving their ancient customs than in cooperating with the investigation. Over time, paranoia grows within the inspector, who feels increasingly isolated and distrustful of the inhabitants. His attempts to find Rowan push him into a labyrinth of strange rituals and unsettling symbols. As he unravels a terrifying connection between the girl's disappearance and the community's practices, Malus confronts the harsh reality that his own life and his concept of justice clash with a world that defies modern logic. The tense atmosphere and psychological horror escalate when he discovers that his mission entails not only rescuing a girl but that he may have been cast in a much darker role in the community's ritual. The culmination of his search becomes a chilling confrontation between his rationality and the primitive nature of the cult inhabiting the island.