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.
In fact, 'Nobody Knows' has its roots in a true story. The filmmakers took elements from a real event to create this narrative, giving it an added layer of depth and authenticity.
I'd recommend 'The Silent World'. In this dystopia, communication has been severely restricted, and the characters must find ways to break free of the silence.
Well, usually it involves a lot of challenges and growth. The character starts from zero, gains skills and experiences, and overcomes various obstacles along the way.