Sometimes, nightmares are a gateway that can bring haunting things back with us...

Teresa McMillan's overbearing mother, Celeste, never allowed Teresa to enjoy her childhood. Upon discovering Teresa's singing talent, Celeste started grooming her for her career, having her eat, breathe, and sleep nothing but classical music. Teresa carried this work ethic into adulthood, sacrificing the fun of her teenage and young adult years to become one of the best opera soprano singers in the business. It's a wonder she ever had time for romance with her fiancé, Matthew Larken.

As mundane as Teresa's life has been, it will become anything but once the suave, irresistible stranger, Ali Rahman, enters her life. First, he shows up in her dreams, which play out like scenes in a horror film. Then he approaches her backstage at one of her concerts and at a local nightclub she visits with friends. Eventually he shows up at her home – uninvited. These encounters are far too common to be a mere coincidence.

Who is this stranger that comes out of Teresa's dreams and makes a cameo appearance in her real life, and why is he so obsessed with her? And who are the other men who are part of the secret society Ali belongs to that start to obsess over Teresa and her relationship with Ali? The answer is beyond this world, causing Teresa to start questioning reality.