Keshu or Keshav Menon (Jayasurya) is a school dropout and a good-for-nothing sort. He is an introvert by nature, works in a photostat shop for living and stays with his mother in modest surroundings. One fine day, he makes a counterfeit note and it leads him to a shady antique shop owner, Danny Sayippu (Mukesh). At the insistence of Danny, he starts making more fake currency and soon, his life goes from bad to worse.
Unnam revolves five men - Sunny (Lal), Aloshy (Asif Ali), Tomi (Prasanth Narayan), Murukan (Nedumudi Venu) and Basheer (Noushi). The group of five coupled with a corrupt cop named Balakrishna (Sreenivasan) plan a deal. However, the deal doesn't work out.
James, a rich IT businessman takes his wife Sarah and kids Julie and Kevin to his newly bought Summer house beside a lake. While having a nice time with family, fishing and grilling along the banks of the lake, Kevin searching for his missing kite enters a haunted place and get possessed by a demonic spirit. The family finally find him unconscious and rushed to a hospital. The Physician Dr. David Woo, a friend and old school mate of James realised the boy is possessed by a unclean spirit and advises James to consult an exorcist to save Kevin. What happened to Kevin and others? Who is the Ghost? What happened at the end? Wait and watch on the screen.
