嗄nniyan is the story of Ramanujam 嗄mbi Iyengar (Vikram), a lawyer who suffers from Multiple Personality Disorder. 嗄mbi is an innocent and honest lawyer. If he comes across anyone not obeying the rules he files cases against them but all his efforts go in vain.　　His constant habit to be perfect in rules and honesty leads him to develop a Multiple Personality Disorder in which a new character in him grows as 嗄nniyan (Vikram) and starts a website called to hear people's complaints. The new character, 嗄nniyan, is a violent man. When he is 嗄mbi and comes across a person who does not obey rules he makes complaints in his website. When he is 嗄nniyan, he goes and kills them by methods used for torturing people in hell. He apparently takes the definition of these methods from the Garuda Purana.