Following the miraculous cure of a young boy suffering from cancer, Hood and Young travel to his home to investigate claims that he has been cured by local spring water. The area becomes a focal point for cancer sufferers desperately seeking a cure. When these victims start to experience even worse symptoms Hood becomes convinced that there must be something in the water. All of the tests prove to be negative, however, and it appears increasingly likely that the boy's doctor has made the entire story up. But shortly after Hood reaches this conclusion, the doctor responsible for the case dies in an apparent suicide. A chance phrase in the suicide note referring to a Geiger Counter, a term the doctor would never use due to Hans Geiger's known Nazi sympathies, leads Hood to begin an investigation into her death, and he uncovers a Government conspiracy to produce heavy water (which he is able to demonstrate is found in the spring). By blackmailing a leading government figure, Hood is able to clear the doctor's name, but is not able to expose the secret service's involvement in the whole affair.