Diyar-e-Dil is a tale of honour, love and relations. The story revolves around Agha Jan and his two sons Behroze and Suhaib. It highlights a son's sacrifice for his father's honour and for the love of his brother. Behroze is engaged to Agha Jan's niece Arjumand since they were kids but Behroze doesn't accept his father's decision and is desirous of marrying his classmate Rohi. The story takes a turn when Behroze leaves his father's house and Agha Jan announces that the wedding will take place as scheduled and Arjumand will be married to Suhaib if not Behroze.