Wally Floody, a Canadian miner turned pilot during World War II, was shot down and put in a prisoner-of-war camp. Determined to escape, he eventually joined a group that began organizing the largest breakout ever, now called the Great Escape - over 600 men, with key help from Wally, known as the Tunnel King, was under constant threat of discovery as they tunneled their way out taking turns digging, inventing tools, forging documents, and hiding the tons of sand they dug from the tunnels.