Major Martin, AKA Hans Strausser, believes the hard part of his information gathering in London is over when he arrives safely in Stalag 13. But with Hogan out to learn what he knows, his troubles are just beginning.

Kommandant Becker of the Eastern front wants a transfer to a warmer assignment. He's willing to trade Hogan battle plans for Stalag 13. Now Hogan just has to convince Klink that Russia is where he wants to be.