From Japan to Singapore. Continuing through the Philippines to Dubai and Yemen. Two former soldiers of fortune and a grounded airline pilot. They search for Japan's priceless national treasure that has been missing since World War II ended in 1945, and a globe-circling 400 series Boeing 747. A story that is woven around the real-life mystery of the lost Honjo Masamune Sword. One of the world's 30 most valuable lost treasures. Crafted by Nippon's legendary 13th-century Master Blade Smith.