World War I, Eastern Front. A special battery consisting of thirteen soldiers and one cannon successfully holds back the enemy. But then the position of the gun is betrayed to the Russians and the cannon is destroyed. Each of the thirteen men is now suspected of being the traitor.
Alexander Golling
Otto Wernicke
Ernst Fritz Fürbringer
Rudolf Schündler
Beppo Brem
Herbert Hübner
Erich Ponto
Friedrich Kayssler
Edwin Jürgensen
Paul Wagner
Fritz Genschow
Anton Pointner
Karl Dannemann
Ludwig Schmitz
Werner Pledath
Fritz Reiff
Erwin van Roy
Werner Scharf
Hans Joachim Schaufuß
Franz Schönemann
Hans Pössenbacher
Walter Hillbring
Lutz Götz
Otz Tollen
Karl Graumann
Ernst G. Schiffner
Otto Kronburger
Anton Färber
Karl Schaidler
Erich Haußmann
Heinz Burkhardt
Willi Cronauer