"An American ballet student ... transfers to a prestigious dance academy in Germany but later realizes, amidst a series of murders, that the academy is a front for something far more sinister and supernatural"--Wikipedia.
Dr. Jekyll, an idealistic London doctor, has a weakness for experiments which take him to the boundaries of human consciousness and experience. When Sir George Carew, father of the girl Jekyll loves, accuses him of being afraid of temptation, he finds a drug which allows him to separate the evil side of his personality from the good; as Edward Hyde, he embarks upon a career of crime.
A susceptible young woman marries a suave, romantic man never suspecting that he is a murderous scoundrel, obsessed with finding the jewels hidden in their London home. She becomes the helpless victim as slowly, insidiously, he drives her to the brink of insanity.
Grace, a devoutly religious mother, has moved with her family to a mansion on the English coast, awaiting her husband's return from the war. When one of the children claims to see ghosts, Grace at first believes her newly-arrived family of eccentric servants to be responsible, but as events become stranger, she begins to wonder if something supernatural is indeed going on.
When her heart is stolen by a seductive stranger, a young woman is swept away to a house atop a mountain of blood-red clay; a place filled with secrets that will haunt her forever. Between desire and darkness, between mystery and madness, lies the truth.