Kavya's Diary (2009)

Raj (Indrajeet) and Pooja (Manjula Swaroop) are a married couple who move into a new house with their children. Desperate for a nanny to take care of their children, they hire Kavya who is unemployed, after she saves Pooja's life.

Kavya grows close to the family and they come to consider her part of the family. However, it turns out that she has ulterior motives. Kavya was the wife of a gynecologist who committed suicide after Pooja accused him of sexually assaulting her. Other patients supported this claim and he eventually committed suicide.

While Kavya made a desperate attempt to save his life, she becomes injured and has a miscarriage. She is so traumatised by the event that she uses her mental equilibrium. She eventually tries to destroy the family and kill Pooja to get revenge for her loss.