The butcher finally makes a few mistakes that provide clues to the STF. The true identity of Abhay's wife's killer is revealed.

Police have been looking for the butcher of UP for 12 years without any success and now STF is brought in. However, this is a tough case as the butcher is not leaving any clues. Govind comes for revenge.

A psychopathic killer is on the loose in Lucknow, leaving cigarette burns on the victim's forehead. Meanwhile, Natasha plays mind games with Abhay.

Natasha and Abhay are working on an old case involving a gangster called Babu. Govind turns from an informer to a vengeful man. A disgruntled teenager goes on a killing spree.

STF investigates deaths caused by potassium cyanide. Jewellery is being stolen from the victims and a devout woman seems to be connected.

Rich men are using a dating app and meeting a mysterious woman, after which they disappear. Police are discovering body parts of a few of them, STF is asked to investigate.

The STF investigation in a case of a missing girl, leads them to Allahabad and to a monster.

Based on the Nithari killings in Noida. Abhay investigates a case where multiple children have gone missing in the last 2 years.