The film features Vishnu Vishal,[3] Gautham Vasudev Menon, Manjima Mohan, Reba Monica John, Raiza Wilson and Gaurav Narayanan.
[4] Irfan Ahmed, an IIT Madras gold medalist based in Triplicane, Chennai, lives with his friends and mother, Praveena Begum, a Sub-Inspector of Police.
Tired of being questioned on his religious beliefs during interviews, Irfan decides to join a full-time perfume business, which is headed by Perumal and his son, Karthikeyan.
Anisha reaches there and surrounds Irfan and Riyaz, but is stabbed by Karthikeyan, who is revealed to be the real Abu Bakkar Abdullah.
Archana, who is also an undercover NIA agent, arrives at the factory and finishes off Riyaz, while Irfan kills Abu Bakkar.
"[15] Manoj Kumar R of The Indian Express gave 3.5 out of 5 stars and wrote "FIR lacks the maturity of Kamal Haasan's Vishwaroopam.
The lack of nuance in properly establishing the islamophobia, misunderstanding suffered by different communities and politics behind intensifying polarization have been left out from the movie for the convenience of the narration.
"[16] Behindwoods gave the film 2.5 out of 5 stars and wrote "Vishnu Vishal's acting, the solid writing makes FIR a gripping and engaging watch.
"[17] Srinivasan Ramanujam of The Hindu wrote after reviewing the film that "Despite being a thriller, FIR also manages to throw in some powerful moments, but could have done well to avoid some unnecessary over the-top elements that seem to dilute its core premise in the first place.
"[18] Navein Darshan of Cinema Express gave 3.5 out of 5 stars and wrote "Debutant Manu Anand sets the bar so high with a lot of interesting elements like these that when inconveniences come in the form of forced comedy and loopholes it almost feels criminal.
I would hate to analyse a film based on the pre and post-intermission halves, but in FIR, the difference is so jarring that you can't help yourself from missing the highly tactful writing of the first half in the latter.
"[22] According to reports from Times of India, the film had a biggest opening and grossed more than 8 crores at the Tamil Nadu box office.