Dan (Dick Powell) is the test pilot due to test a new military plane. He needs to be clear headed and level headed to put the plane to its limits.
Only in the morning his daughter Chris is ill. The family fear it could be Polio. Someone who Chris came into contact with has recently been diagnosed with Polio.
Dan and his wonder if he should go to work that day. Polio was dangerous then as there was no vaccine at the time.
He does go to work but Dan racks his brains as to what could be wrong with his daughter. Even asking questions back at base as he flies the plane. Maybe it is Measles.
There is not much of a drama here. Maybe you have to be aware of the fact that there were no vaccines for some diseases such as Polio in those days. The consequences of getting Polio would be very serious.
Of course nowadays it is fashionable to be an anti vaxxer!