It only takes a couple of visits to convince Dr Elizabeth Bancroft that Adam Hunter is not just having bad dreams. He's a child possessed.

His father is desperate: adamant that his son's affliction is the result of a curse he incurred in the depths of the Amazon, where a badly misguided military operation ended in a terrifying and macabre encounter. There he met two women - one more bad than good, who placed the curse - and the other more good than bad, with whom any hope of saving his son resides.

Mark Hunter leaves the Scottish Highlands to beg help from the mysterious woman, leaving his son in the care of Elizabeth - who is about to discover there are equally dark secrets on their own doorstep.

And in her blood...