The base of this story is slightly different from original plot of maddam sir, Anubhav Singh appoint as a new DSP in lucknow with his secret mission, and we want to win the heart of haseena malik for this purpose he starts flirting with her, but soon he realized  he is doing wrong with her and impressed with her kind nature, her  Passion of patriotism, her dedication towards her duty, so he decided to tell her whole truth regarding his mission, for this he choose the way against his senior's order and told her everything. But she already fall in love with him but yet she is not confess her feeling. After knowing about the mission she falls more, she deeply loves him with the core of her heart day by day her lives for him increases, she knows very well that his mission is against her beloved uncle, she is very closed to her uncle, but she believes that one day she proves Anubhav singh wrong, but for her, her duty always comes first she thought that Anubhav singh is a negotiation specilist his information never be wrong, and do it for the sake of their country, for the sake of many lives,so she decided to help him in his mission but she also believe that her chachi ji is innocent, and she will clarify all thing and prove her chacha ji is  innocent but  this is not a right time because it's the question of thousands of lives.  They decided to do act like they are deeply love each other and soon they will unite. Haseena Malik is very sincere with her duty and uniform. She said, she is with him  that if really her uncle will be culprits, she  will herself punish him.

But at the end of mission she proves that her chacha ji is innocent , but his information is also correct, her choti maa her beloved choti maa is behind all this. She injected virus in her and sacrifice her life for country, but thanks to her beloved SI karishma Singh and Anubhav singh who saved her after giving her antidote...