Set during the height of the First World War, Passchendaele tells the story of Sergeant Michael Dunne, a soldier who is brutally wounded in France and returns to Calgary emotionally and physically scarred. While in the military hospital in Calgary, he meets Sarah, a mysterious and attractive nurse with whom he develops a passionate love. When Sarah's younger asthmatic brother David signs up to fight in Europe, Michael feels compelled to return to Europe to protect him. Michael and David, like thousands of Canadians, are sent to fight in the third battle of Ypres, a battle againts impossible odds, commonly know as "Passchendaele". It is a story of passion, courage and dedication, showing the heroism of those that fought in battle, and of the ones that loved them.