Summary

Jack and George accidentally stumble across Canada's top secret spy camp. Soldiers catch them and send them homw and they are told to never come back again. But they go back and then they get caught. So the Lieutenant-Colonel interrogates them and finds out that the boys know more than he imagined, so they are recruited to be spies (unofficially). Then the editor of the newspaper, Mr. krum, gets suspicious of the boys and kidnaps them at gunpoint, and ties them up in a farmhouse inside Camp X. Despite bring tied up very tightly, Jack and George manage to escape and foil a nazi plot to attack the camp.