In August 1914, while Jean Mordant is in Buenos Aires securing the title of World Wrestling Champion, his daughter Mimi suffers a brutal assault by German forces in Ostend. Determined to seek justice for this heinous act, Jean vows to take revenge. Accompanied by his coach Victor and his young nephew Guido, he joins the elite Armored Car Division (ACM). However, their cumbersome vehicles frequently become mired in the muddy terrain of Flanders. Consequently, the unit is swiftly redeployed to the Eastern front. Jean is overwhelmed with despair upon discovering that Mimi is now pregnant. Despite the harsh realities of war, he and his companions embark on a harrowing journey that will eventually lead them across the globe.