SECRETS IN THE BONES: THE HUNT FOR THE BLACK DEATH KILLER follows evolutionary biologist Hendrik Poinar as he travels to Italy, Germany, Britain and the United States in search of the pathogen that caused the bubonic plague during the fourteenth century. Together with a team of international experts, Poinar examines DNA samples from both centuries-old and modern-day plague victims in an attempt to definitively identify an ancient killer and change the way we fight disease today.