During an artillery barrage at the Civil War battle of Antietam in 1862, a young colonel lost his leg. More than 150 years later, he lost the same leg in a traffic accident on the Washington, D.C. Beltway!Diane Kowalski, a research scientist, examines tissue from the anonymous victim's severed leg. She discovers a genetic mutation that could make regeneration possible - and increase longevity. Diane and Jack O'Sullivan, a private investigator, follow...