Telephone is a mystery thriller drama. The movie revolves around a wealthy man named Suresh, who runs a successful business with his best friend Dinesh; however, when he learns that Dinesh is cheating him, he throws him out of the business. Later, Dinesh frames Suresh for the murder of his secretary Rajni, and gets him arrested. However, Suresh manages to get the bail, but he is confronted by Rajni’s sister Anita, who assumes him to be the killer of his sister. Anita joins hands with Dinesh to exact vengeance from Suresh. Will Anita ever be able to realise the truth?