The sequel to 2013 film with the same title, Chennaiyil Our Naal 2 is an adaptation of a novel, which is written by a crime writer, Rajesh Kumar. The story revolves around two bad guys who struggle with forces of good and evil while exploring the psychological secret that most people tend to bury deep within their conscience. The film reveals some of the darkest secrets, which manifests into a series of violent attacks that seek to destroy the protagonists.