'Katha Kahini' is a story about Katha and Kahini. They belong to warring families, but later realise that they are in fact half-sisters. Kahini manipulates Katha's love interest, Lakshaya into marriage. Katha marries Lakshya's brother, Sanskar. Once he learns the truth, Sanskar swears to reunite Katha with Lakshya, but in turn falls in love with her. Will Katha choose her lover over her husband, or will the sanctity of holy matrimony triumph?