Tom Mix has agreed to undertake a dangerous, secret mission from which he may never return! Right now, Tom and Sheriff Mike Shaw, and a man who calls himself Mr Moonlight, find themselves in a strange city after the plane in which they took off from the Twin Rivers airport was grounded because of bad weather. A moment ago, a car driven by a beautiful young woman, ran into the car in which Tom, Mike and Moonlight were riding from the airport into town. The young lady's car was so badly wrecked that they offered to take her home in their car...