Gerald and Jessie Burlingame have gone to their summer home on a warm weekday in October for a romantic getaway. After being handcuffed to her bedposts, Jessie tires of her husband's games, but when Gerald refuses to stop, the evening ends with deadly consequences. Still handcuffed, Jessie is trapped and alone. Over the next twenty-eight hours, in the lakeside house that has become a prison, Jessie will come face-to-face with all the things she has ever feared. Her only company is a hungry, stray dog and the various voices that fill her mind. As night comes, she is unsure whether it is her imagination of if she has another companion watching her.