Devil in the House?

A murder... A book... And nightmares... The murder of her sister brings Mehak back to her hometown. As she returns, she gets hold of a book that Sarah wrote before dying. The book hits some untouched wires in her brain hard, and soon the line between reality and nightmares blurs. She realizes that returning to the city was a mistake. Sarah had some secrets that, if spilt out, would threaten her peaceful life.