The police are baffled; ACP Abhijit Pakrashi struggles to solve the case, which takes a toll on his relationship with his girlfriend, Amrita Mukherjee, a TV journalist.

Abhijit's superior officer, Commissioner Amit Kumar Srivastav, brings back ex-DCP Probir Roy Chowdhury, to help solve the case.

Meanwhile, eccentric poet, Nibaron Chakraborty, who considers himself to be a part of the Hungry Generation, wanders Kolkata at night reciting poems.

For her research, Amrita visits a prison where the warden remembers Rafique Ahmed and his only confidant during his 18 years of imprisonment: Nibaron Chakraborty.

They almost succeed in learning about Rafique when Surjo angers him by mentioning the book fair arson, for which he was imprisoned.

Probir tells Abhijit that he went to work the day after losing his wife and child, encouraging him to be strong.

When they search all possible days the killer could strike, they discover that the next date is 29 June, which is the death anniversary of Michael Madhusudan Dutt.

This convinces him that Nibaron is the killer, especially when Swapan tells Probir about his employer's nightly walks around the city.

It becomes clear that Nibaron does not consider the movement to be a failure, and has no regret about his attempted arson at the book fair years ago.

Baishe Srabon is the first mainstream film incorporating the Bengali "hungry generation" movement of the 1960s into its plot.

At the Zee Banglar Gourab Awards 2012, the film received nine awards from thirteen nominations: Best Film, Best Director, Best Actor Critic's Choice (Prosenjit Chatterjee), Best Supporting Actor (Parambrata Chatterjee), Best Music Director, Best Screenplay and Dialogues, Best Male Playback (Rupankar for "Gobhire Jao"), Best Cinematography and Best Editing.

At the International Bangla Film Academy Awards at Pattaya, Bangkok, Baishe Srabon won the Best Director, Best Screenplay, Best Actor in a Supporting Role (Gautam Ghosh), Best Male Playback Singer (Anupam Roy), Best Cinematography and Best Critic's Choice Performance (Parambrata Chatterjee) awards.

[2] A spin-off sequel of the film was released on 23 January 2020, titled Dwitiyo Purush directed by Srijit Mukherji with Parambrata Chattopadhyay, Abir Chatterjee and Raima Sen reprising their roles.

[3] In March 2023, Mukherji announced a prequel crossover between Baishe Srabon and Vinci Da as part of his planned Cop Universe with Prosenjit and Anirban Bhattacharya respectively portraying Probir and his new sidekick, Inspector Poddar to be released on Puja 2023.