Watch Online Free on Watchseries. Alistair, a genetic researcher battling terminal cancer, makes a mysterious deal that saves his life— but the cost is locked behind his basement door. For 72 hours, he must not open it, no matter what he hears. As time passes, paranoia takes hold. Reality begins to slip. Haunted by visions of a woman in blue and harassed by suspicious neighbors and a jealous ex-boss, Alistair's mind begins to fracture. What’s behind the door? Why does it call to him?