| Director | Dayal Padmanabhan |
|---|---|
| Country | India |
Priya boards the Gandhadagudi Express from Mysore to Bangalore after visiting her uncle and aunt in Mysore. As the train departs, she appears visibly sad. The train is also baorded by other suspicious-looking men travelling in the same coach. Just as the train departs, Dhanush and his four friends — Satya, Kitty, Karisubbu and Michael — run and board the train at the last moment. The story then shifts into a flashback.
Dhanush is an aspiring scientist living with his family in the railway colony in Mysore. He and his friends — Sathyaprakash, Krishnamurthy "Kitty", Karisubbu and Michael Fernandes — spend most of their time at the local railway station, often engaging in harmless pranks. In one such prank, they impersonate the personal assistant of the Union Railway Minister and falsely announce a surprise inspection, causing panic among railway staff. Later, three of the friends write an anonymous letter to the station master claiming that a bomb has been planted on a train. Unaware of this, Kitty ends up writing Dhanush's name as the sender. Realizing the possible criminal consequences, the friends desperately attempt to recover the letter, only to discover that it has already been loaded into the Railway Mail Service compartment of the Gandhadagudi Express. The group immediately boards the train in an effort to retrieve it. Meanwhile, Dhanush has reconnected with his childhood friend Priya, who has developed feelings for him. Her proposal rejected, a disheartened Priya now returns to Bangalore by the same train that carries the fake bomb later that the friends have now boarded.
Aboard the train and while attempting to retrieve the letter, Dhanush accidentally overhears conversations suggesting that an actual bomb attack on the train is being planned. The friends continue their attempts to recover the letter after learning that it has been transferred to the postal sorting office in Bangalore and is scheduled to be delivered to the railway authorities. Priya eventually learns the truth and joins them in their efforts.
The situation escalates when Satya is kidnapped by terrorists, who reveal that a real bomb has indeed been planted on the train on the same date mentioned in the prank letter in a coincidence. The kidnappers threaten Satya's life and force Dhanush to retrieve the letter before the authorities are alerted. Dhanush eventually locates and defuses the bomb hidden inside a baby stroller on the train. He and his friends then identify the real terrorists after suspecting several passengers during the journey. An undercover Anti-Terrorism Squad arrives in time and arrests the terrorists. Following the ordeal, Dhanush finally confesses his love for Priya.