Three months after her marine scientist husband Rory went missing, artist Mara is distraught to discover that the search for his body has been called off. Alone in their remote coastal home, she is steeped in memories of Rory. But the old house is leaking and Rory's ghost is everywhere. Mara is determined to uncover what happened to Rory, not realizing that she faces a danger that is extremely close to home.

After initiation into the prestigious York Witches Society, Amber Gray and her new friends unwittingly awaken an ancient evil hellbent on destroying the Gray bloodline. As the witch hunt begins, the women realize they may not make it through the night.