Even for a horror comedy, the premise of Naayagi feels flimsy. It involves Sanjay (a game Satyam Rajesh), a sleazeball, who decides to take his girlfriend 'conservative' Sandhya (Sushma Raj, decent) to his friend's farmhouse with the intention of sleeping with her, even as he is trying to enter into wedlock with a rich woman. They are diverted to a…