The story of the acquaintance of a Sphinx doctor and tree cats. A story from the era of the early colonization of the Sphinx, when people and tamed tree cats are just beginning to understand that their connection is empathic. At the farm where such a “tamed” doctor is delivering a baby, a starving lost cat wanders into the farm and urgently demands that the doctor follow him. He takes him to the site of an aircar crash where his owner died, and the doctor realizes that he needs to find out the truth about this air disaster.