Set against the backdrops of Kanyakumari, the film revolves around an undercover agent (Gautham Karthik) crawling into a mafia group headed by AGR (Silambarasan) to know the whereabouts of missing Chief Minister (Santhosh Prathap). What unfolds next is a series of unexpected twists and turns.
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?
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.