Raj Purohit expresses his desire to have a word with Radhika and Barkha in private. Radhika feels relieved when Raj Purohit tells her that he knows she is innocent, but at the same time he tells Radhika that she will have to still pay the price. Raj Purohit then asserts that Radhika will have to forgo her marriage with Dev, and Barkha will have to take Radhika's place. He also makes it clear that Radhika will have to leave the Purohit mansion. Radhika obliges much to Barkha's chagrin. Meanwhile, Shanti gets elated when a matchmaker tells her that he has an alliance for Chanda. However, she soon gets irked and chides the matchmaker when Mansaram informs her that the bridegroom is 48 years old. On the other hand, everyone is stunned when Raj Purohit formally announces that Radhika will have to leave the Purohit mansion and Dev will have to marry Barkha immediately. However, Dev shocks Raj Purohit by making it clear that he will not leave Radhika.
Choti Bahu is the love saga of two soul mates Dev and Radhika.
Radhika, a Brahmin by birth, was adopted and brought up by a family of weavers in a small town called Rawal. Dev, whose family has been in the service of Rajpurohits for generations, visits Rawal as a child on the occasion of Radhashtami. Dev and Radhika meet each other and become good friends. Radhika and Dev's families tie them in the bond of marriage in their tender age.
Maheshwari (played by Pragati Mehra), the eldest bahu of the Purohits, hopes to inherit Dadaji's property. However, her plans hit a snag when Maheshwari realizes that Dadji has willed all his property is in the name of Choti Bahu.
Undeterred, Maheshwari decides to find a docile girl for Rohan (played by Apurva Agnihotri). Maheshwari plans to own the property by controlling and manipulating the Choti Bahu and to this end chooses Radhika for Rohan. Destiny brings Dev and Radhika together after 15 years, when he returns to Rawal after 15 years to find out about Radhika, Rohan's bride.
Will Dev recognize Radhika? Will Radhika marry Dev or Rohan? Will Radhika become the Choti Bahu of Purohit House?