The book tells the story of Daniel "Fighting Mac" McKenzie, a remarkable military chaplain who served with the ANZAC (Australian and New Zealand Army Corps) forces during World War I. Known for his unorthodox methods and fierce determination, McKenzie was a spiritual guide who also physically defended and rescued soldiers in the trenches, earning him legendary status among the troops. His story is one of bravery, compassion, and unwavering faith, as he navigated the horrors of war to provide comfort and support to the soldiers fighting on the front lines. Through his actions, McKenzie became a symbol of hope and resilience, embodying the spirit of the ANZACs.