Nazi Agents are at work in the neutral countries of Europe - attempting to subvert so as to provide further easy victims for the Third Reich. Dr. Palfrey and the 'Rescue Squad' are faced with the challenge and danger of meeting this treachery and overcoming the full might of the German state in its quest for power. There is much standing against them, and they are likely to be uncovered and caught at any moment, but they must succeed as the fate of the allies may depend upon it.