Today I watched a French movie named called "Samba".

[If we are talking about a film or book, we more often use to verb "to call".]

I haven't been interesting interested in watching French movies before, but this one has changed my mind.

[The word "interesting" describes on an object or person that people are responding to. Ex. "This book is interesting." or "She always has something interesting to say." or "She's an interesting person." 

The word "interested" describes a person who likes or doesn't like something. Ex. "I'm interested in art." or "No, thank you. I'm not interested."]

It's about an African immigrant called [or "named" (used more commonly)] Samba who'd been in France for almost 10 years with no papers nor an opportunity for a better job. All he had was his uncle, who worked in a restaurant and helped him from time to time. Samba fell in love with a beautiful woman, who worked as an immigration officer, and she was the responsible for his case. The police caught Samba and put him in a temporary prison so as to wait for his trial which would decide whether would he stay in France or be deported back to his country...

[Good job Moorad! Your summary of the film is very clear and easy to read. Keep up the good work!]

An Immigrant

* en français 'le/la responsable' [nom], mais en anglais 'responsable' existe seulement comme adjectif.