Asur: Welcome to Your Dark Side

The sudden death of a priest right in front of his teenage son sends people in a frenzy. 11 years later, Nikhil Nair, a forensic expert teaching at the FBI HQ, receives coordinates of an unknown location from a mysterious source only to find out a completely mutilated, tortured and charred body back in India. With a killer responsible for a murder that can make even the toughest cops shudder on the loose, Dr. Dhananjay Rajpoot, a forensic expert is set on a wild goose chase.

The investigation takes a wild turn as Dhananjay finds out the mutilated and charred body found earlier was in fact of his wife - Sandhya. But even before he could come to terms with the inconceivable loss, Dhananjay is arrested for murdering his wife. With the clock ticking, and the pressure mounting, another body with the same mask is recovered from Nagaland.

With Dhananjay behind bars, Nikhil thinks it's all over until he gets 3 new coordinates from the same mysterious source. The killer follows the same pattern - thoroughly planned assaults targeted at random people at random locations. The chilling new development now raising more questions - Why Nikhil? And Why Now?

The killer has always been a step ahead of Nikhil and Dhananjay. It's more evident than ever as Nikhil is now trapped in killer's custody and Dhananjay is behind bars. But what does the ruthless killer want? A perfect murder carried out by Nikhil himself! Meanwhile, Dhananjay finally figures out how it's all connected.

With a merciless killer on the loose and Nikhil in his custody, the desperate CBI now turns to DJ for help. Leaving nothing to chance, DJ gets on with the investigation. Meanwhile, Nikhil is given his new murder mission. On target, Aaditya Jalan, a billionaire philanthropist.

Worried for his family, Nikhil gives in to the killer's demand and plans to murder Aditya Jalan. But this time it's his mentor DJ who is pulling all stops to catch the killer before it too late. It's mentor vs protégé! Who will win the deadly game?

2 perfect murders down, Nikhil's given his next target… and it's none other than Dhananjay Rajpoot, his mentor and friend. For the sake of his family, will Nikhil murder his own mentor?

It all boils down to the final face-off! Nikhil, Dhananjay and the killer are now involved in the battle of wits and only one will survive this sinister game.