On June 9, 2007, the murder of Koruna Prasad Mukherjee, a renowned editor known for his provocative column “Knock, Mock, and Shock,” sends shockwaves through Kolkata’s high society.

Prasad is found dead in a grotesque scene where women’s underwear is used as part of the murder. His body is found with an expression of terror, and his pants are unzipped with his genitalia exposed, suggesting a final mocking defiance. But the case is immediately marked as classified by the chief minister, aiming to suppress the scandalous details.

Motilal Mistry, the chief inspector of the detective department, is thrust into the investigation despite political interference. 

Mistry takes help from his two special friends - a renowned ethical hacker PG and his ex-commando friend Vicky. On Mistry’s request, they hack the mobile phone of Sudeb, the illegitimate son of Koruna Prasad, who first discovers his father’s body inside the antechamber and takes some pictures thinking that will help him later to reclaim the property of which he has not been part of. 

When the pictures come out in the media, the chief minister is forced to lift his ban on free and fair investigation and Mistry has been given a free hand to interrogate everyone of these influential families.

As investigation progresses, Mistry comes to know a film actress who has been bed partner and seen with Koruna Prasad before the murder takes place. 

However, the film actress reveals another dark truth about Koruna Prasad that amazes Mistry as he meets a dominatrix who is actually Koruna Prasad’s daughter in law.

Now a turbulent family drama and a wave of mistrust, suspicion among other family members that mainly consist of Koruna Prasad’s elder brother Jamuna Prasad, sister Jahnavi Prasad and the illegitimate son Sudeb, unfold around the huge disputed property and everyone has a cause to perpetrate the murder of Koruna Prasad.

It also comes out that Koruna Prasad has a secret pleasure chamber underground where he practises BDSM and all types of perversions possible in the world with his daughter-in-law, Purodha, involved in a BDSM relationship with him. Purodha, claiming her daughter is her husband Sudeb’s, reveals that Prasad had a secret will bequeathing his property to Purodha’s daughter, whom he believed to be his own.

Meanwhile Mistry finds that twenty years ago the chief mason Shaikh Munna, who is behind building the secret pleasure chamber, dies mysteriously and as always Koruna Prasad asserting his influence to suppress the case.

The investigation takes a supernatural turn when Shaikh Munna, the chief mason who built Prasad’s secret pleasure chamber, reappears as a look-alike ghost.

His mysterious appearance after twenty years provides a crucial clue, connecting the threads of the case in ways Mistry has never anticipated. 

As a result, this perplexing appearance of a dead man makes him able to connect the maze of dots as Mistry navigates through family betrayal, hidden agendas, and dark secrets; he must piece together the clues from a labyrinth of lies to uncover the true murderer.

The resolution unveils a shocking twist, bringing justice in a case that seems too great to overcome.