George Galen is a brilliant scientist, a pioneer in gene therapy. But Galen is dangerously insane - he has created a method to alter human DNA, not just to heal diseases, but to "improve" people - make them stronger, make them able to heal more quickly, and make them compliant to his will. Frank Hartman is also a brilliant virologist, working for the government's ultra-secret bio-hazard agency. He has discovered how to neutralize Galen's DNA-changing virus, making him the one man who stands in the way of Galen's plan to "improve" the entire human race.