Rupali, “a modern woman” who has her own goals and ambitions, “lures” Prem a married and perfectly innocent man into her love. Because it’s perfectly alright for innocent men to get attracted to hot modern woman, but they can’t spend their lives with them because “bahar ki biryani ek din achi lagti hai, roz toh ghar ke daal chawal se hi pet bharta hai”. So now prem leaves his housewife Pooja to live with the modern woman. Pooja soon realises how it was her fault because she couldn’t mould herself to Prems requirements causing innocent prem to fall into the witch Rupali’s trap. Now Pooja makes a plan to get Prem back and make him fall in love with her again. Because she’s BIWI NO. 1 and that’s her purpose in life. So she wears short clothes and sends her kids and mother in law to live with prem and Rupali, who in turn trouble Rupali. Thus, making prem realise that modern woman are just good to look at and to have some fun once in while , but you can’t spend the rest of your life with them.
So fast forward, Rupali leaves prem for another man and prem rescues Pooja from a bunch of goons, making everyone happy again. Pooja understands that it’s important for her to be sanskari and modern for Prem.
The movie ends with a moral for all young girls watching the movie, on how they should be for men to like them. Because that’s an ideal woman’s sole purpose, to mould herself perfectly to fit the needs of a man. And to not be like Rupali, because such women are looked down upon in our society.