A group of female writers hire a lone lodge on an uninhabited island for the winter, to use as a writers retreat. A supernatural force is disturbed and the group have to try and survive until their weekly supply boat arrives.

Inspired by the events which took place in the summer of 1816 at Villa Diodati, Geneva a group of female horror writers try to emulate their heroine, Mary Shelley by staying through the winter at a lodge on an uninhabited remote island to write a horror story. The only contact with the outside world is through the caretaker and his wife who live the other side of the island, and a local fisherman who lives on the mainland who delivers supplies to the island every week. Just like Lord Byron, Susan the leader of the group sets each writer a challenge, to develop their own classic horror story. The intention of the group is to write their story during the long winter nights at the isolated lodge. They each take turns in reading aloud a story from the book Fantasmagoriana in order to get their creative juices flowing, as did Bryon 200 years before. A few weeks into their stay the caretaker resurrects a long dead, supernatural entity by accidentally disturbing its grave whilst digging footings for a shed. The women are then thrown into their own real life horror story and have to fight for their survival.