CID team has finally found and arrested the leader of The Eye but it is not over yet. They plan to transport him to a secret safe house to question him. But still, they are ambushed en route. Can CID overcome this obstacle after 20 years?
In Mumbai, a woman is stalked by strangers and on her birthday party night, the stalker, Naina and her husband are killed. And in Bengal, an elderly man who is waiting for his nephew Byomkesh Bakshi dies seemingly by heart attack.
The ACP shoots at Daksh and flees much to the CID's shock. Daksh, fighting for his life, tells the DIG that his life is in danger because of the ACP. The DIG responds by telling Abhijeet and Daya to kill the ACP in an encounter.
CID team up with the fearless Inspector Shekhawat, digging into cases that he has worked on in the past involving similar serial killings. They realize that the person behind this may be caught by the Inspector a few years ago.
The pieces of bodies of several police officers begin to be found across the city in big red suitcases. This is the work of a serial killer, sending a message getting his revenge on the police.
Dayaben finds the ACP's wallet and brings it to the CID bureau. It turns out that it's fake. The person carrying the wallet has been killed. CID suspects that someone is masquerading as the ACP with his face by plastic surgery.
Kareena gets a bomb threat from an obsessed fan. He wants her to come to him otherwise he will kill her on the day of the release of her movie Heroine. CID gets into the case and finds the dead body of Kareena's bodyguard.
A witness is to be brought to court who's going to give his testimony against a terrorist and keeping his family safe. An elaborate plan is devised, but they're still attacked. The witness's daughter is taken leaving Abhijeet injured.