After losing her husband during the Great Plague, Grace Haverstock is unjustly accused of being a witch and placed in the custody of England's most ruthless witch-hunter, Judge Moorcroft. Forced to endure physical and emotional torture while steadfastly maintaining her innocence, Grace faces her own inner demons as the devil himself starts to work his way into her mind.
At the experimental sleep clinic Somnium, dreams become real. Side effects include hallucinations, confusion, paranoia, sleep paralysis, detachment from reality, a lost sense of self and permanent nightmares.
When Mia, a social media star, becomes the target of an online terror campaign, she has to solve a series of games to prevent people she cares about from getting murdered.