A shipowner intends to scuttle his ship on its last voyage to get the insurance money. Charlie, a tramp in love with the owner's daughter, is grabbed by the captain and promises to help him shanghai some seamen. The daughter stows away to fol

这是一部讲述国共两军和日本侵略者三方为了各自的目标进行的幕后较量，剧中着重描写了几方间谍斗智斗勇的过程，是我国第一部描写战争背景下的谍中谍、计中计的军事悬疑片，故事情节平中求悬，被称为军事版《黑洞》。