Kasautii Zindagii Kay (Hindi: कसौटी ज़िंदगी के; English: The criterion of life), often abbreviated as KZK, is an Indian Soap Opera created by Ekta Kapoor for the channel STAR Plus. The show ran for seven long years and starred Shweta Tiwari, Cezzane Khan (who was later replaced by Hiten Tejwani), and Ronit Roy in lead roles; Urvashi Dholakia and Geetanjali Tikekar as the main antagonists. The show explores the story of Anurag and Prerna who fall for each other but they never unite because of Komolika who plots against them and the conspiracies made against them. It describes Anurag and Prerna—lovers who were separated throughout their lives but achieved union in death.