One victim, found dead on a London street. Four detectives, in four different time periods, must solve the mystery to protect Britain's future.

After an au pair’s tragic death, Henry Wingrave hires a young American nanny to care for his orphaned niece and nephew who reside at Bly Manor with the estate’s chef Owen, groundskeeper Jamie and housekeeper, Mrs. Grose. But all is not as it seems at the manor, and centuries of dark secrets of love and loss are waiting to be unearthed in this chilling romance. At Bly Manor, dead doesn’t mean gone.

Ruthless siblings Roderick and Madeline Usher have built Fortunato Pharmaceuticals into an empire of wealth, privilege and power. But past secrets come to light when the heirs to the Usher dynasty start dying at the hands of a mysterious woman from their youth.

With his days numbered, high schooler Yuji decides to hunt down and consume the remaining 19 fingers of a deadly curse so it can die with him.