I'm not sure specifically which 'voice from the grave true story' you're referring to. There could be many such stories that involve things like alleged messages or signs from the deceased. It might be a story about a person who heard something that they believed was a voice from a loved one who had passed away, perhaps in a spooky or mysterious setting.
One of the more well - known cases could be the story of the Enfield Poltergeist. In this case, the family claimed to hear voices and experience strange phenomena that they believed were related to a spirit or something like a 'voice from the grave'. There were also reports of furniture moving on its own and other spooky happenings.
I don't think so. Usually, such titles are more for fictional or imaginative storytelling rather than representing actual happenings. It could be a work of pure imagination or inspired by various fictional elements.
One key element is the struggle for survival. Just like in the true story, the characters face extreme hunger and have to scrounge for food in a war - torn environment.
Grave of the Fireflies was not a true story. It was created to convey the emotional and tragic impact of war through a fictional narrative. The director used artistic expression to evoke powerful feelings and raise awareness about the human cost of conflict.