Kalavu is a slick, gripping crime thriller drama set in the outskirts of Chennai. A group of three friends are embroiled in a chain snatching crime that they haven't committed. After a night of binge drinking, the three of them playfully escape from the clutches of the cops during their routine checks for 'DD' (drink and drive) cases on the roads. The friends slowly realize the magnitude of the situation and the stress that's in store for them. They face harassment from the cops and have to somehow relieve themselves from the situation.