The story might have some roots in truth, but it's likely that the author took some creative liberties to make it more engaging. Maybe it's a blend of real experiences and imagination.
It depends on how you define a true story. Some elements might be based on real events or emotions, but it could also have fictionalized parts for literary effect.
I'm not sure specifically as there could be many 'Seventh Man' stories. It might be about a group of people where the seventh man has a unique role, experience or perspective within the context of the story.
The story 'The Seventh Man' is about a man who has been haunted by a traumatic event from his past and how he finally confronts and tries to overcome it.