Thought Factory

I will tell you a story. There was a village in a remote area in India. It was ruled by an evil land lord. People in that region are terrified and pray to god to send someone to save them.  There  enters the hero  from somewhere. He encounters heroine by mistake and falls in love. He spends time romancing    her for some time. Then comes confrontation with villian.  F ight starts  between protagonist and the  villain . Each devising strategies to take down each other. Finally comes a moment when a person very dear to hero was killed by  villain  very cruelly. And hero takes revenge on villian and saves the village. Sounds familiar?  I saw this story hundreds of times in different languages with a different hero, heroine, villain, different place, different time.  I like watching movies as it was my favourite source of entertainment from my childhood.  There came my curiosity about story telling. How can people watch / read stories with same plot again and again?  I starte