Anu (Anasuya Kasaba) an aspiring director develops a script on a producer’s request. Twist in the tale arises when the murders scripted in the story start happening in real life. The parallel story is crux of Kathanam.

The movie begins in a bar, where an aspiring director meets his friends. One of his friend, Meenakshi Sundaram (Aadhavan) says he has a beautiful horror story script from his own experience and narrates what happened in his friend’s life.Venkat (Vivanth)