Kaun?

“Do not open the Door......”

A woman alone in a house hears on the news that a serial killer is loose in the city, and then the doorbell rings. Ram Gopal Varma keeps nearly the whole film inside those rooms, where Ma'am (Urmila Matondkar) lets in a stranger (Manoj Bajpayee) and a police officer, Qureshi (Sushant Singh), comes asking questions. She has no idea who to believe, and she is the only one in the house whose life is at risk.