A father and his eight year old daughter, on their way to Mumbai meet a quirky stranger who calls himself `340`. Before they know it, they are plunged into a terrifying roller coaster of fear as 340 turns out to be a psychotic killer. In a bid to flee from him and protect his daughter, the father is fatally injured. In his desperation to keep his child from harm, he manages to lock himself and his child in a deserted bungalow, but in time he too succumbs to his injuries. Now the young girl is trapped in the bungalow with just her father`s dead body for company.