In Louisville, Kentucky, a team of four men robs an amusement park of more than $1.8 million. But the mastermind of the plot double crosses the others and gets away with all the money. Now, the three robbers and the FBI are after the same man. Erskine and Colby follow a trail from Louisville to Cincinnati to St. Louis as the investigation unfolds. Meanwhile, the man who planned the robbery returns to his home in San Diego, his wife unaware of the double life her husband has been living. The bureau apprehends one of the robbers in St. Louis, the first major break in the case. With that arrest, the mastermind knows the pressure on him will intensify.
—Bill Koenig