The book recounts Dr. Brian Weiss's actual experiences with a patient named Catherine, detailing her regressions to past lives under hypnosis. It is presented as a factual account of his clinical practice and the unexpected discoveries made during therapy sessions.
This book is Dr. Weiss's foundational work, introducing the concept of past life regression therapy that he further explores and expands upon in subsequent titles like 'Through Time into Healing' and 'Same Soul, Many Bodies.' It sets the stage for his later discussions on soulmates, healing, and spiritual growth.