Shantanu Kant, a scientist creates a super humanoid robot with the help of his best friend Devendra Bangdu.The robot is named RAJNI, short for "Randomly Accessible Jobs Network Interface", a robot with 10X the power of hulk, a human's body, a pretty face and a brain faster than 100 computers.
The robot was made for saving humans' life. After a few episodes, Shaan made Rajni his wife as he did not want to take burden of wedding along with his dreams and aspirations of becoming a renowned scientist. The Kant's women do not like Rajni as her daughter-in-law due to Rajni's weird behaviour, and also because Surili (Shaan's mom) wanted a classy Bengali girl as her 'bahu' - so, Surili never accepts Rajni as her daughter-in-law by heart. But, the Kant's men always favour Rajni and like her nature.
Many problems arise in the Kant family-some of them come by themselves and some are unintentionally created by Rajni as she does not understand humans accurately. But, Rajni always saves the Kants from all these troubles-sometimes with the help of Shaan and Dev. Later Rajni misinterpreted Shaan's command and changed his face by plastic surgery which creates some problems but later all confusions are cleared by Shaan. In the middle of all this, other confusions arises which made Shaan to dismantle Rajni. Kants have gone bankrupt post. Shaan been in USA, returns with his fiancée Ria. The Kant fix the marriage to get their wealth by Ria's rich family.
It is then revealed that Rajni saved herself from the factory 5 years ago where she had found an infant on the streets and had decided to adopt him but Rajni was not updated with latest technologies. Rajni's adoptive son named as R.A.M, incidentally help Kant's family who were then invited to Kant Nivaas where Ria finds out about Rajni and broke up the alliance. Shaan then decides to divorce Rajni. Meanwhile, the court gives Shaan and Rajni 6 months' time to their marriage.
In these 6 months, Rajni wins everyone's, including Shaan's trust back, but later she was proven to be a human by Surili. Soon it gets revealed that the girl was Rajjo, the duplicate of Rajni.
Soon Shaan and Rajjo start developing mutual feelings for each other. Amrish learns about Rajni's truth, he accepts her, but this reunion is stopped by a robot from other planet who looks exactly as Shaan, and asks Rajini to come with him. She is about to leave when Shaan, R.A.M and Amrish try to stop her, but being given command to leave with Shaan-like robot, she turns away. The robots fly away, leaving the three (Shaan, Amrish, R.A.M) in tears when Shaan finds a small machine on the ground, presumably belonging to the robot from other planet and he believes to bring back Rajni with the device.
