A once-in-a-century storm hits the remote Scottish island of Toll Mòr. As the isolated community take shelter, a barbaric crime sets off a chain of events which heralds the rise of an ancient evil and threatens to change the course of history.
Starring Golden Globe winner Joanne Froggatt (Downton Abbey) as Police Sergeant Jackie O'Hara and Rege Jean-Page (Roots, Bridgerton), this 8-part supernatural thriller is created by acclaimed writer and director Mark Healy and produced by Storyglass.