A completely healthy young man suddenly loses his memory - he cannot even keep in his head what happened just an hour ago. Two Lyme disease patients are recovering after treatment with antibiotics, but all their symptoms mysteriously return. A young woman is dying—bleeding, confused, yellowed skin—and none of the doctors know what's wrong with her. The author and doctor describes what is going on in the minds and souls of colleagues who are trying to solve a new professional puzzle - and save another life. Never before has humanity had so much knowledge, methods, and tools to identify a disease. And yet, mistakes do happen: doctors make incorrect diagnoses, overlook symptoms, and misinterpret test results. Lisa Sanders is sure: in the world of high technology, knowledge and evidence are not enough to treat people. She proves that intuition, ingenuity and real courage are also required; states that not only instrument readings are important, but also the personal history of each patient.