Movie Story : Devathai, the daughter of former minister Chitravel, meets her first love Kaushik again at her grandmother's death and sets out on a romantic quest to learn more about him. Her elder sister Nithya, meanwhile, begins a relationship with Prakash, the son of her father's rival Paddi Alandhan. As the household is shaken by four mysterious murders, special investigating officer Nagaraj works through the clues to uncover the person behind them.