Jonathan Liebesman directs this taut psychological thriller. When four people sign up for a seemingly innocuous psychological study in return for a cash payment, they find themselves embroiled in a top-secret government research programme with highly sinister overtones, run by a team of psychologists led by Dr Phillips (Peter Stormare). When talented military psychologist Ms Reilly (Chloe Sevigny) joins the team of researchers, she begins to question the brutal methods and dubious motives of her employers.