Another theme could be self - reliance. Maybe the protagonist has to rely on themselves completely during this long journey back as there is no one else to depend on. They learn to trust their own instincts and abilities.
The 'the long way back true story' might refer to a story of a long journey home or a difficult return journey. It could be about someone facing various challenges, like physical obstacles, emotional turmoil, or dealing with unexpected situations on their way back. However, without more specific context, it's hard to be more detailed.
It depends on your perspective. Some elements of 'A Way Back' are inspired by true events, but there might be fictional additions for dramatic effect. Overall, it has a foundation in reality.