A cult hellbent on death and destruction. A troubled family with a twisted web of secrets and lies. An ancient forest swarming with ungodly abominations. When Hattie and Richard Penrose take their family on a 'staycation' to the Cornish village of Bodhmall's Rest, cracks in their unsettled marriage start to appear, as does the truth about Hattie's fling with a co-worker and Richard's burgeoning money problems. As the family members battle their own individual demons, strange creatures are sighted in the woods, and the ghost of the mysterious Red Man appears in the attic. When an undercover SOCA agent uncovers links with a criminal organisation known as The Belvedere Saints, things start to unravel at a terrifying pace. Little do the Penrose family know that Glanna Cormoran and the members of her pagan cult are keeping a close eye on them. And the Terrible Babies. They're watching too.