This is an incredible movie and I'm honestly baffled with the number of negative reviews.
The story begins with a skull being found by a fisherman in kerala, following which the police begin an investigation on the identity of the victim and cause of death. Prithviraj does an impressive job as the police inspector who heads the investigation.
Paralelly, a single mother (also an investigative journalist) moves in to a new house with her daughter. A series of paranormal activities makes her begin to investigate the strange activities surrounding her.
I saw some reviews that mentioned that the paranormal angle was not really required for this movie, and I tend to agree. But this is the genre chosen by the director, and the film unexpectedly works even with the supernatural angle.
I would urge everyone to watch this move. The actors are good, the screenplay, editing and soundtrack are incredible. The story is engaging and we were hooked from the first minute. Must watch!