Aasi (Panja Vaisshnav Tej) fall in love with Bebamma (Krithi Shetty) since his childhood. He confesses it to her and the duo get along with disparity in their classes. But it is more than her father Rayanam (Vijay Sethupathi) that scares to form a chasm separating the lovers.  

Devil is the story of a British secret agent who takes up the job of solving a dark mystery. This mystery is deeper than he could penetrate and this leads him into a web of love, deceit and betrayal. His success and failure, both have serious consequences and this mystery can change the course of history.