A simpleton, Dheena, is an auto rickshaw driver who is a very loyal and honest human being. With loads of kindness in his heart, Dheena always tries to protect girls who are harassed by cops. As he falls in love with a girl as soon as he sees her he begins to follow her despite her clearly stating that she does not want to have any relationship with him. In a sudden turn of events one night witnesses two murders and Dheena is the one who is suspected by the cops to be behind the two murders. As Dheena figures that his father and lover could be the next victims of the serial killer he races to save their lives and at the same time has to clear his name of the crime that he has not committed.