Shaun Pinner was a retired and decorated British soldier, living a peaceful and happy life in Mariupol with his Ukrainian family.
What follows is the true story of his six months spent imprisoned in Russian-occupied Ukraine.
After the horrors of frontline fighting, Shaun had to survive his capture by the Russian soldiers, and his removal to a Black Site - an off-the-grid prison untethered to human rights conventions - where he was subjected to a campaign of torture by Putin's secret police.
It saw him shocked with electricity, stabbed, beaten, and almost starved to death, all while trying to maintain his morale with the other POWs.
Shaun tells a story that is both an unstoppable record of the fierceness of the fighting and a powerful testament to the strength of the human spirit.