The Railway Protection Force officer Williams decides to bring in strict rules and asks his subordinates not to show any mercy towards defaulters who mess with railway rules. With the help of his team, Williams nabs many passengers who violate rules in different ways, which include peeing on the railway track, traveling without the ticket, and so on. Sathya, who is on his way to Puducherry, to marry his girlfriend, Meghala, too, is one among them, who has been taken into the custody at Tambaram railway station. He befriends the other defaulters at the RPF station and they hatch a plan to help him escape from police custody.