I'm not sure specifically as I haven't read it. It could be a story about friendship, with characters toasting to their bond. Maybe it's about a group of people who have overcome difficulties together and are celebrating their journey.
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.
I'm not sure specifically as I haven't read it. It might be about a group of people who are in a new place where they are unknown and the various experiences and self - discoveries that follow.
Since I haven't read the novel, I can't say for sure. But it could be a group of friends. Maybe there's a lead character who is the driving force behind their adventures or relationships.