Another soul is darkness, and if the soul is also sick, it appears to us as impenetrable darkness. The task of psychiatry - to figure out what is in this darkness and where it came from - is not only extremely complex, but also excitingly interesting. Seven stories from the practice of the prominent British neuropsychiatrist Anthony David make up a collection of real scientific detective stories. To investigate unusual cases of mental illness, Dr. David and his colleagues use the latest technological advances in their field, decades of clinical experience, and simple tools available to each of us: participation, compassion, and the ability to look at things from different perspectives. Having looked into the abyss of the sick consciousness together with a reliable guide, we no longer see darkness, but the vigorous work of scientific thought. And fear gives way to hope.