| Director | Kamal Haasan |
|---|---|
| Box office | ₹220 crore |
In New York City, a psychologist conducts a session with a nuclear oncologist, Nirupama, who begins to confide that her marriage was one of convenience. Her husband, Vishwanath, aka Viz, a Kathak teacher, has feminine behaviour, which prompted her to be attracted to her boss, Deepankar. She suspects that Viz has secrets of his own, and hires a P.I. to find anything to be used for divorce. She learns from the P.I. that Viz is a Tamil Muslim. The investigator is killed in a warehouse by Farukh, a prominent member of the cell led by Omar Qureshi.
A diary on the P.I. gives away Nirupama's existence, and the group led by Farukh invades her home and takes Viz and Nirupama hostage. While Viz and Nirupama are held hostage, Viz surprises Nirupama by killing Farukh and his men single-handedly and escaping with Nirupama.
Omar and Viz are then revealed to have a past; they were both involved in Taliban training camps. Viz's real name is Wizam Ahmad Kashmiri, an alleged Tamil Jihadi, wanted by the Indian Army. Omar, the leader of Taliban, accepts him into his team. One day, Omar tells Wizam that American prisoners of war are still alive and incarcerated. He orders his deputy, Salim, to behead the Captain and capture it on video. The next day Wizam sees Osama bin Laden greeting the Taliban and Al Qaeda chieftains in a cave. Then, a US-led air force begins a bombing raid on the town. Omar begins to suspect that there is an informant on his team but mistakenly orders the lynching of an innocent man. Eventually, it is revealed that there are sleeper agents scraping caesium-137 from oncological equipment to build and trigger a dirty bomb in New York City.
Nirupama is stunned to discover the true identity of Viz, along his uncle Colonel Jagannathan, his British friend Dr. Dawkins, and the young dancer Ashmita. Viz later reveals that he has a lot of emotional baggage and that he has executed many militants, including Nassar, Omar's boss. His mission is to bust the sleeper-cell of Taliban in the US. Wizam and his team try to counter Omar's plans, and in the ensuing events, they are arrested by the FBI for questioning.
Dawkins is murdered by Salim while picking up a videotape from an antique shop. The FBI later releases Wizam and the women from custody after he reveals himself as a RAW agent. Wizam, along with the FBI, takes down Omar's agent Abbasi and defuses the caesium bomb with the help of Nirupama. Omar tries to activate a bomb through his phone but fails. He then calls Abbasi, but the call is answered by Wizam, who tells him that Abbasi is not alive. Omar is shocked to hear this, but he escapes with Salim in his chartered flight. Wizam indicates that he will now go after Omar.