When Andrea, a damage regulator from Benthos Oil, is sent out to Rig 45 two days before Christmas to investigate a fatal accident, the rig is hit by a hurricane and all communications lost. Soon, the crew realize that the accident is in fact a murder, and they now know that they are in real danger.
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. What follows is a blend of suspense, mythology and the murders of some people totally unrelated.
The black sheep of the Argyll family, Jack Argyll, was accused of murdering their matriarch a year ago, but now a man shows up on their doorstep claiming Jack’s innocence. The family must come to terms with this news and the fact that the real killer might still be among them.