Jorge Michel Grau's Big Sky is the tale of Hazel (Bella Thorne), a teenage girl who suffers a mortal fear of open spaces. She never leaves her bedroom, which has put a strain on the relationship with her strung-out mom, Dee (Kyra Sedgwick), and is starting to take its toll on both of them. In a last ditch attempt to cure her daughter, Dee enrolls Hazel in a high-end treatment facility in the desert, hoping they will finally find the help they require so that Hazel can begin to move forward from the horrors of her past that triggered her illness. But help is the last thing that they get. When two brothers, Jesse (Frank Grillo) and Pru (Aaron Tveit), interfere with Hazel and Dee's plans in the worst possible way, Hazel must confront her paralyzing fears before they consume her and is forced to fight for her survival in the harshest conditions, all while avoiding the cunning schemes hatched by Jesse.