Chanakya Thanthram Malayalam Movie Online HD, The story is Arjun (Unni Mukundan) an intelligent criminologist with great observation skills, who aspires to become a private detective. He shifts to Cochin to join a private detective company owned by Irene (Sshivada). He is given a task of gathering information about four people by monitoring them secretly. He does his job with great passion and impresses her by solving all the cases assigned to him, that too within a short span of time. During his task, he meets an orphan girl Andrea (Shruti Ramakrishnan) and eventually develops an attraction towards her. However, Arjun is given a task of collecting information about Andrea. Despite a rule that private detectives are not allowed to get into relationship with any of the people they follow, he falls in love with Andrea. As Arjun becomes curious about the reason behind monitoring her, the film takes an interesting twist and turn and what happens later has been narrated in Chanakya Thanthram.