Mercury is a Tamil thriller movie directed by Karthik Subbaraj. Prabhu Deva and Sananth Reddy in the lead roles. A thick friends dumb and deaf reaches a hill station for their vacation. After enjoying they hit a man (Prabhu Deva) in trying to save a dog. They decides to bury his body in nearby factory, but the accident victim starts reacting weird and wants them to killed. What happens next? Is rest of the story .