Well, it could be about an orphan's real - life experiences that are turned into a movie. Maybe it shows the challenges the orphan faced, like finding a place to live, dealing with loneliness, and searching for a family or a sense of belonging.
The 'orphan move based on true story' is likely to tell a very touching and inspiring story. It could start from the orphan's early life, perhaps being abandoned or losing their parents. Then it might show how they grew up, their struggles in school or in society. It could also focus on their relationships with others, like making friends or falling in love. And ultimately, it may show how they found their own way in life and became a strong and independent person.