Since I don't know the movie well, I'd say it might be about isolation. The title gives the impression that the protagonist is in a state where no one is aware of their existence, which often leads to themes of loneliness and self - discovery.
It could be very significant. Since it's based on a true story, it might show how a person can exist in a state of anonymity even though they are part of real events. Maybe it's a story of someone who was overlooked or not given attention during certain real - life events. It could also touch on themes of self - discovery within that state of being unnoticed, like how the person coped with being in a situation where nobody knew they were there and what they learned from it in the context of the true story.
Since I don't have enough information about this 'nobody knows i'm here real story', I can only guess. It might be a story about a person who has escaped from a difficult situation and is now hiding, thinking that nobody knows where they are. Or it could be a more psychological story about someone who feels invisible in society, like a shy person who believes that nobody really notices them in a crowd.
Once upon a time, there was a little girl named Lily. She lived in a small village at the foot of a big mountain. One day, while she was exploring the forest near her home, she found a strange, shiny stone. It was as big as her palm and had a beautiful blue glow. She took it home, and that night, she had a vivid dream. In the dream, the stone told her that it was a magic stone from a far - away land. It said it could grant her one wish. Lily thought hard and wished for the village to have a well with clean water all year round. The next morning, she woke up to find that there was indeed a new well in the middle of the village, filled with the clearest water she had ever seen.
It depends on your perspective. Some elements of the story may have roots in real events, but it's also likely that there's some fictionalization for dramatic effect. So, it's a mix of both.