At the start of the film, we see a strange family. There was a couple and their 3 kids in that family. They had one boy and two girls. In the starting, we see these siblings together. This was a strange family. They have strict rules, I will tell you moving further. The first rule is that they can't go outside of their home. They also don't know about the outside world. The house in which they were living was their world. They think that there was nothing outside. They were trained like this they think that this is everything. They eat, play, study they do everything in this house. They have made the walls of their house so tall. That none can see in their house even they can't see outside. Their parents have brought them up strictly. They have made a lot of rules. That how to eat, how to walk and nothing will be done without their permission. Even they teach their kids themselves. Even they also don't know that there is another animal except for a cat in this world....