The Secret Squadron agents and their companion have been enjoying a well-earned rest at an American air base in the South Pacific. Major Barry Steel, powerful undercover official, has gone over preliminary plans for Captain Midnights desperate venture into the Japanese mainland. Our present scene opens in the morning several days later. The sun is shining brightly on this New Guinea flying field, and in front of a huge hangar, Chuck and Joyce are watching a formation of planes getting ready for take off.