一名旅居海外的印度新郎在婚礼前几天身亡，两名警察必须揭开这桩谜案的真相 — 但他们自己生活中的麻烦也接踵而至。

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.