Naina arrives looking for Nikhil with their daughter Ria, though Nushrat is unable to calm her down when Dhananjay's team inadvertently reveals that Nikhil has gone missing. During work on the case, he meets Kesar Bhardwaj, a motivational speaker on spiritualism. In the present, Dhananjay is tasked by the CBI to work on the case while in prison. Shubh doesn't show much remorse and instead starts preaching from within the prison, as a wilful follower joins him and becomes his first disciple. The episode continues with incident 11 years ago where Shubh is arrested and put behind bars for his father's murder. Meanwhile, Dhananjay tries to figure out how it's all connected.

In the present timeline, Nikhil almost succeeds in finding out the murderer's location, but an automated tranquilizer attack results in the killer successfully capturing Nikhil alive in a remote location with no access, and Dhananjay is behind bars. After the death of the father, DJ tells everyone that he died due to poisoning and not drowning. While doing the puja, DJ finds something fishy about Shubh. The episode continues with the incident 11 years ago as it is shown that DJ was the person who was doing the puja rituals. The killer follows the same pattern of thoroughly planned assaults targeted at random people at random locations. In the present timeline, with Dhananjay behind bars, Nikhil thinks it's all over until he gets 3 new coordinates from the same mysterious source. The episode continues with another glimpse of the story set 18 years ago where it is revealed that Shubh shows symptoms of autism, and is deeply ill-affected by his father's torturous behaviour towards him. But even before he could come to terms with the inconceivable loss, DJ is arrested for murdering his wife, based on Nikhil's calculation, and the camera pans out with the sight of a mysterious person witnessing all this. Being directly related to the murdered, DJ can't handle the case anymore and Nikhil takes over the case. Towards the end of the episode, DJ receives an envelope containing a video in which the charred body is revealed to be that of his wife, Sandhya. In the present timeline, Nikhil comes back to work with the CBI, where he meets his former coworker and ex-girlfriend Nushrat. The episode starts with a story set 18 years ago where a young Shubh is shown as cold, ruthless and cruel. The modus operandi of the murder reveals that a serial killer is on a murder spree, in which DJ's wife is also included. Meanwhile, in India, a murderer kills a woman and her charred body is found by the police the next day, whose autopsy is performed by Dhananjay 'DJ' Rajpoot, a senior forensic expert in the CBI. Later on he is shown doing some dillydally with his wife Naina, arguing about the reasons to leave his job with the CBI, something which he deeply regrets. The story moves on to the present, where a forensics expert, Nikhil Nair, is shown teaching at the FBI HQ. The young child is emotionless and it is shown that the child presumably poisoned his father. His father, while returning in a boat with his son, drowns in the river and dies. The episode starts with an 11 year old story where a young child named Shubh is seen performing puja rituals along side his father and a person. What follows is a blend of suspense, mythology and the murders of some people totally unrelated.

Set in the backdrop of the mystical city of Varanasi, Asur follows Nikhil Nair, a forensic-expert-turned-teacher, who returns to his roots at the Central Bureau of Investigation, and along with his former mentor Dhananjay Rajpoot, finds himself caught in a cat-and-mouse game with a brutal serial killer.

Hindi serial kesar episode 1