A disoriented Romit Sen is found in his car covered in blood, while his protégé, Diti, is nowhere to be found. Diti's mother, DCP Brinda Basu's relentless search begins.
When the evidence points fingers at Romit Sen, Brinda's interrogation of Romit gets heated. Meanwhile, the police find a hit-and-run victim resembling Diti.
The news of Diti's disappearance and Romit's arrest spreads like wildfire. While the witnesses give contrasting statements, the forensic team notices something unusual.
The leaked texts between Romit and Diti cause a public uproar. As Brinda tries to verify those texts by confronting Romit, it takes her to an unknown threshold.
When Diti's whereabouts continue to elude everyone, Brinda seeks the help of Mahendra Gupta aka the Sweeper, a forensic legend infamous for his mercurial nature.
Diti's disappearance creates a void in Brinda's mind. Panic-stricken after learning about the hit-and-run case from Sahana, Brinda visits the morgue to identify the victim.
Brinda seeks help from her mentor and encounter specialist, Ananta Chatterjee, while her enemies push for Romit's bail.
Brinda grills Bijoy and Reshmi about the party, while Romit, now out on bail, finds the only supposed eyewitness.
Romit finds refuge with Sahana, while Ananta hints at a deeper conspiracy.
Brinda seeks clues from Joydeep. Romit struggles to track down the eyewitness.
Sahana's search ties Romit to another murder. Brinda's bond with Joydeep deepens.
Sahana is stabbed chasing a suspect, while Brinda unexpectedly finds the final key to the mystery.
Brinda learns gruesome details from that night but the final piece of the puzzle is still missing.
Brinda sets the stage for a showdown with all suspects, unaware of the hidden mastermind who had orchestrated it all.