A joke gone bad, the story is about Dhanush (Ganesh) and his group of friends who live in the railway colony and their meeting point is the railway station. Dhanush is the leader of the gang and just to have some fun, they decide to send a letter stating on a particular date a train travelling from Mysore to Bangalore will be exploding. However, what they realize later after posting is that one of the friend's address is there on the letter. In a hurry, they get into the RMS bogie of the train and after a lot of twists finally manage to extract the letter from the pile. In this process, what Dhanush discovers is that the same day a real plot has been hatched by the terrorists to blow up the Gandhadagudi express so he decides to locate it and foil the plan. In the process of his journey, the friends take a break at one of the houses where Priya (Archana Gupta) and in no time, love blooms between Dhanush and her. So what happens to Gandhadagudi express? Is Dhanush successful in his attempts? All this forms the rest of the story.