Ramaswamy (S. A. Chandrasekhar) is hit by a motorized fish cart and then beaten up by ruffians and left for dead in a gutter. Then we get into his family to meet his wife (Rohini), son in law (Chetan) and his little granddaughter who admires his every move. Ramaswamy's 75th birthday is being celebrated at the house and just at the time of cake cutting a call comes and he leaves abruptly to join in a protest against Tasmac where he threatens to jump from a building top and the authorities yield to him and shut shop. Then the story moves on to explore other protests by the activist and how gets beaten up often. He files a PIL seeking a ban on the motorized fish carts ("Meen body vandi in Tamil), that involves an MLA, Inspector, political kingpin and mayor who make arrangements to finish him off.