Struggling with horrifying, sleep-paralysis induced visions, Anna (French), a young writer, retreats with her boyfriend (Brand) to an isolated yet beautiful glass house in the desert. Hoping that the desert vistas surrounding her will spur her creative juices, she welcomes the opportunity to stay behind when her boyfriend must return to the city for urgent business. However, Anna's sleep paralysis does not abate, despite the calming environment. And now, her attacks are accompanied by a mysterious figure, caked with dirt as if it was made of sand itself. As the visions intensify, she finds herself on the verge of losing her mind...or is she being lead to uncover a life-threatening secret?