Algumas sugestões de correção/melhoria:
This is the story about a guy called Mark who had an idea to create a website. Firstly, the people at his university started to use it, and then the website became famous in a short period of time, now it’s used by hundreds of millions of people worldwide.
The movie portrays that all the success of Facebook (the name of the website) makes Mark forget about the people that helped him to make his idea come true.
Eduardo, Mark’s best friend, helped him with money at the beginning of the project, and three other guys helped Mark with the idea for the social network. Now those people are bringing Mark to justice.