[1][2][3] The title Gharjamai refers to a man who is financially dependent on his wife's family, which carries a social stigma in cultures of the Indian subcontinent.
Shibnath is raised by Amar Banerjee's driver Sanatan, an honest man.
He blackmails Mamata and coerces her to allow her daughter Tina to be married with Mahim's insane son Rocket.
Mahim on the other hand brings Debnath as a wild card and introduces him to Mamata as Sabitri's long lost son.
The childhood mystery of all three are revealed and while Mahim Ghoshal is punished, the entire family reunites again.