When Arun (Udhayanidhi Stalin) comes across an innocent woman in an unstable condition struggling to drive her car back home, he reaches out for help, only to find her dead body, the next morning in the car. What happened to the lady? Who killed her? What's the mystery lying beneath?
The story revolves around a good-hearted man (Sasikumar), who gets into a turbulent and complex process of helping a North Indian family by making efforts to send the mortal remains of a woman in their family back to their native so that they can perform the final rites according to their customs.
Rudhran, who works tirelessly for a successful career and money, embarks on a romantic journey to spend quality time with his girlfriend Nila. On the way, he stays at the Vasantha Mullai Motel. The events that unfold in a single night drive Rudhran insane and take him on a roller coaster ride.