What you can't see can hurt you. Cecilia Kass is trapped in a violent, controlling relationship with wealthy, brilliant, but abusive scientist Adrian Griffin. After she escapes in the dead of night and goes into hiding, Adrian commits suicide and leaves her a generous portion of his vast fortune. But Cecilia suspects his death was a hoax. As a series of coincidences turn lethal, Cecilia's sanity begins to unravel as she desperately tries to prove that she's being hunted by someone nobody can see.