[4] The film explores the drug-fueled crimes and consumption of substances, like marijuana and LSD, by the youth.

Louis Pothen is a popular part-time television film critic, an artist, and a divorce lawyer who also participates in a live TV channel named "Kathrika".

She finds Jeena's phone number from Louis's mobile, calls her, and narrates her ordeal.

Jeena encourages Vasuki to tell her what happened, but she strays away from the topic and focuses on men who sell fish near the building, Sura and Shibu, who make irritable compliments about housewives who buy from them.

Pachabasmam's death makes Sudeep a little worried but Aryan dismisses it, telling him he might have just smoked too hard.

It is later revealed that Louis was informed by Swami, a resident of a neighboring apartment, of his wife being raped.

Louis never reveals the truth to Vasuki and decides to keep it a secret so that they can lead a happy married life.

In July 2015, it was reported that Mammootty and Nayanthara would play an inter-caste couple in A. K. Sajan's forthcoming film.

It was also reported that Sajan initially wrote the script with Renji Panicker in mind for the lead role, with Muthumani as the heroine.

[17] Puthiya Niyamam has reportedly collected ₹8.12 crore (US$940,000) and completed more than 7,000 shows at the Kerala box office.

[20] Sanjith Sidhardhan of The Times of India rated the film 3 out of 5 concluding, "Puthiya Niyamam is an intense tale elevated by the screen presence of its protagonists.

"[21] Rating 3.5 out of 5, Akhila Menon of Filmibeat called the film "a perfect thriller" and appreciated Mammootty and Nayanthara for their performance and "exceptional" screen chemistry, A. K Sajan for his direction and "brilliantly-written" script and Gopi Sundar for his "extraordinary" background score.

The critic said, "The movie is engaging from the beginning till the end, even though most of the scenes are restricted to the lead characters.

"[22] Anu James of International Business Times also gave a rating of 3.5 in a scale of 5, saying "With thrilling moments accompanied by right amount of comedy, AK Sajan's scripting in "Puthiya Niyamam" makes the movie interesting and thought provoking," and noted Nayanthara's performance as her "career-best".