A Muslim chemical engineer has been suspected of being a terrorist on the run. Is he able to clear his name? What's in a name, anyway? If you're a Muslim, it's a lot, according to FIR. A police officer who has apprehended a suspected terrorist receives a call from his superior, who requests the man's identity. "Why am I not surprised?" he retorts when he hears it's Irfan Ahmed.

FIR, like Vishwaroopam, is a mystery set against the backdrop of terrorism that aims to demonstrate how incorrect it is to hold an entire community responsible for the awful atrocities committed by a few members of that same group. Irfan Ahmed (Vishnu Vishal, who fully commits to the role and gives us a solid portrayal) is a chemical engineer from IIT-Madras who is irritated that his faith is a point of contention during interviews. He looks to be having a peaceful life with his mom (Maala Parvathy), a lower-level female cop.

Simultaneously, the National Intelligence Agency receives information that Abu Bakkar Abdullah, their most sought terrorist, is in Chennai, preparing operations in Colombo and India. ajay Dewan, the National Security Advisor (Gautham Vasudev Menon, in a position that calls for more of his screen presence and stature), assembles a squad to track him down. Irfan comes on their radar as they conduct surveillance on a Muslim cleric named Zazi Manzul (Amaan). Circumstances cause them to conclude that Irfan is Abu Bakkar, and they even place him under arrest. Is it possible for Irfan to cleanse his name when no one believes he is innocent? What happens to the plot of Abu Bakkar?

FIR is a powerful, fast-paced thriller that hits all the right notes in the first half, with director Manu anand deftly alternating between scenes from Irfan's lifestyle and the NIA's investigation. Prarthana (Manjima Mohan, effective), a criminal defense lawyer who is buddies with Irfan, Anisha Qureshi (Raiza Wilson, outstanding), a no-nonsense NIA investigator, and Gunashekar (Praveen Rangan), a lower-ranking officer who gets a significant break in the investigation, are among the interesting side characters.

If the first half felt the audience in a rushed mood, the second half seems rushed with plotholes as well. The picture, which had appeared to be pretty grounded in reality up until that point, begins to drift into over-the-top terrain, with sequences that make us doubt their credibility. There's also a touch of motherly sentiment that's off-kilter with the rest of the movie. We do get a twist that helps to explain some of Irfan's behavior, but it also raises a new set of issues. As a result, the climax, which has echoes of the family man and Vishwaroopam, isn't as suspenseful as it should be.

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