Maari (Dhanush) is a local don who becomes quite popular after murdering a powerful goon eight years back. As time passes by, a cunning cop named Arjun (Vijay Yesudas) gets transferred to that area and he makes it a personal mission to put Maari behind bars.In order to accomplish his goal, he takes the help of Sridevi (Kajal), who also has a personal grudge against Maari. Will he be able to accomplish his task ? What is Sridevi’s personal grudge against Maari? Does the duo succeed in putting Maari behind bars? These questions form the crux of the story.