STR’s Mottai Madhan in Manmadhan falls head over heels in love with the wrong girl and woos her with simple minded devotion when he is not being a disgusting voyeur who sees nothing wrong with climbing a tree to spy on the girl of his dream. To his great surprise, his clumsy proposal is accepted. Later while on a voyeuristic mission, he discovers his girlfriend’s perfidy and proceeds to murder her and her partner in cheating before offing himself as well and making a serial killer of his hitherto upright brother. Now that is truly messed up!