Rootless and heartbroken Stephen Wraysford joins the army at the outbreak of World War I. He and his men are given the assignment to tunnel under the German lines and set off bombs. The comaraderie, love, and loyalty of the soldiers contrasts with the horrors of the underground, air, and trench warfare.

Rootless and heartbroken Stephen Wraysford joins the army at the outbreak of World War I. He and his men are given the assignment to tunnel under the German lines and set off bombs. The comaraderie, love, and loyalty of the soldiers contrasts with the horrors of the underground, air, and trench warfare.