An emotionally unstable college freshman (Leighton Meester) grows obsessed with her unsuspecting roommate (Minka Kelly) in Danish director Christian E. Christiansen's English-language debut. Trouble begins after a frat party, when Kelly's Sara character comes back to her dorm room smashed, pausing to meet her roommate, Rebecca (Meester), for the first time just before she rushes out of the room to puke. Both being artistic types, Rebecca gloms onto Sara's artistic yearnings and they both bond over couture culture, yet Rebecca's antisocial behavior always seems to stand in the way of them being best buds. Soon it becomes apparent that Rebecca's territorial side is something to be freaked out by, as Sara's ex-boyfriend, her pervy teacher, and anyone else that do the young artist harm will attest.