Ek Tha Raja Ek Thi Rani narrates the old-time love story of King & Queen.
Gayatri is forcefully married to Ranaji who is in the shock of losing his first wife. After several months of his marriage with Gayatri, he learns that he started loving her & leads a happily married life ahead. This season ends with the death of Ranaji & Gayatri.
In this season, Gayatri's daughter, Rani is the main lead. After the death of her parents in the last season, she is taken care by Rajmata. Rani remains unaware of Rajmahal & her connection. She leads a normal life with Rajmata. Things change when she co-incidentally gets a job in the Rajmahal where she falls for Raja who is the Prince of Rajmahal. Like the previous season, this one too ends with the death of Rani.
This season starts with the leap of 10 years. Now, Raja lives in Mumbai away from the royal life. He becomes a don in Mumbai. One day, he sees a look-alike of Rani whose name is Naina. After so many incidents, they fall for each other.