Psychological teen thriller starring Leighton Meester and Minka Kelly. Arriving in Los Angeles from the midwest to start college, Sara (Kelly) immediately hits it off with her wealthy new roommate, Rebecca (Meester), who quickly takes her under her wing. But when Sara becomes ever more popular on campus, hooking up with boyfriend Stephen (Cam Gigandet) in the process, Rebecca's detachment and resentment towards Sara increases. Although suspicious that something is wrong, Sara reluctantly accepts an invitation to a Thanksgiving dinner at Rebecca's parents' sumptuous home. With her roommate's behaviour becoming increasingly erratic, and realising that all is not as it should be, Sara stumbles upon a secret that will set the two roommates on a violent collision course.