12AD. A blackbird calls a warning. Anna, a slave girl running away from her Roman masters, pauses to listen as she lifts a totemic, druid carving she's found in the tunnel where she's hiding. The last thing she sees is a tangle of matted fur, a sheaf of claws, a flash of fangs, as she unleashes a hungry animal presence. 1783 AD. Centuries later, white witch Sarah Gibson wanders the wood in search of refuge. She's at ease here with the changing seasons, the plants and animals, until one moonlit night, she senses Anna's terror. The blackbird calls a warning, but Sarah wants to help Anna's restless spirit. Present day. Marie is furious when her twin, Billy, secures a place at art school and she doesn't. She is sent to 'cool off' at her aunt's. But the woods nearby are hiding something. Marie can feel it. She hears the local gossip about tragic happenings there.