Kannalan portrays the helplessness and challenges of people who are isolated in society, through the life of a journalist.

Kannalan portrays the helplessness and challenges of people who are isolated in society, through the life of a journalist. The film is about the life of a journalist named Harinarayanan. It also discusses in detail the sociopolitical situation in today's world. The movie is a direct testimony of real human beings and the harsh realities of life.