In post-war Vienna, occupied by the Allies, four sergeants representing each of the occupying nations (USA, England, France, Soviet Union) patrol in the same Jeep. One day they are given the mission to capture and arrest a prisoner who has run away from a Soviet war prisoner camp. But when they learn the truth about Karl, the runaway, and Franziska, his wife, they decide to help him instead. The trouble is that the Soviet sergeant is held on a short leash by his superiors. He has strict orders not to let the fugitive slip away and he comes into conflict with his fellow military policemen. In these conditions, will Karl and Franziska be reunited and live free again?