I'm not sure specifically what this 'bas ka bhid me sasur ka land story' is as it seems to be a very specific regional or cultural story. It could potentially be about a piece of land that has some sort of connection to a father - in - law (sasur) in a place called Bas Ka Bhid. Without more context, it's hard to say more.
The 'bas ka bhid me sasur ka land story' is a mystery without more background. It could be that in Bas Ka Bhid, there was a particular parcel of land that was of great significance to the sasur. It could have been the site of a family's livelihood, like farming. There might have been a story of how the sasur protected the land from others who wanted it, or it could be about how the land was divided among family members in a way that was related to the sasur's wishes or the family's traditions.