The story revolves around a mysterious murder and a game between Bharath (Arulnithi), a calm and composed cab driver, and Ganesh (Ajmal), an urban cheat, who blackmails people for money.

As the tittle Iravukku Aayiram Kangal is all about a sequence of incidents that take place in one night. Several people become part of a murder in one or the other way, leaving behind certain evidences and questions. How all of them are connected in different ways forms the crux of the plot.—Sj