Tara Bakshi is a young lawyer with a difficult boss. No matter how hard she works, how many all-nighters she pulls, he is never satisfied. When she starts work on the top-secret assignment, Project Emerald, Tara discovers that someone had been tampering with the files and her boss asks her to find the culprit. As time ticks and Tara uncovers one evidence after another, someone starts stalking her every move. He shadows her on the street, in the parking lot, in her own bedroom; nowhere is she safe from his prying gaze. The only clue she has to his identity is a Zippo lighter with a serpent carved on it.