Starting tonight is Bahu Hamari Rajni_Kant. Shaan Kant is a scientist. He is poised to create something useful to mankind. His mother and sisters-in-law attend a Working Women’s Day function when a fire breaks out due to short circuit and Shaan’s ‘creation’ reaches there!
Shaan feels proud of inventing a super robot, Rajni. Rajni rescues Shaan's mother, Surili from a fire accident that breaks out during the women's working day celebration at a hotel. Surili is eager to meet Rajni and is grateful to her for saving her life.
Shaan confidently takes Rajni for the presentation but the Randomly Accessible Jobs Network Interface or RAJNI doesn't follow his commands and ruins it all. The deal falls through and a disheartened Shaan discards Rajni as 'garbage'. Meanwhile, Shaan's mother is dreaming about an 'ideal Bengali girl' as her youngest daughter-in-law!
Shaan is upset with Rajni for ruining his project. Later, she decides to stay away from him. Surili makes Shaan realise that Rajni had rescued her from the fire! Shaan manages to pacify Rajni. Surili is eager to get Shaan married, but he is not interested.
Shaan is in financial trouble after Matthew rejects his project. He tries to purchase a motherboard for Rajni (Super Robot). On his insistence, Surili agrees to help him on the condition that he marries a girl of her choice. Shaan provokes Amrish to choose a Punjabi girl for him.
Shaan teaches Rajni to wear a sari. He asks her to interact with the women in the market. Surili interviews a few Bengali girls for Shaan's marriage. She chooses a girl, Debolina for Shaan, whereas Amrish selects a Punjabi girl, Ruby. Later, Surili conducts a test for Debolina and Ruby.