Colonel Joe Mackenzie, the battle call-sign “Half-Blood,” leads a group conducting tests of the “Night Wing”—the newest fighter aircraft with an ultra-secret weapon system. The colonel is fully committed to this project, determined to carry out the assigned mission with honor.
But then an annoying distraction appears at the base: a beautiful blonde, an expert in laser weaponry, Caroline Evans, has joined the test group. True, she met the colonel quite coldly—but Joe wouldn’t be the best of the best if he backed down in front of a woman, even the smartest one.
Later he discovers that someone in the group is sabotaging the tests.
Suspicion falls on Caroline, whose specialty matches, and also on her habit of working late.
Now Joe must make a choice: loyalty to the country or love for the main suspect.