When Professor John Robis becomes a subject in a secretive sensory-input experiment, he doesn't anticipate that he will enter an inter-dimensional portal more mysterious than a black hole. Crossing the chasm between matter and spirit, and brain and mind, he discovers a world inhabited by mindlings, beings much like ourselves who live within each of us. These mindlings form the core of our identities and give meaning to our behavior. His odyssey propels him into a strange medieval world, where the mindlings who compose his identity struggle among themselves and endanger his sanity and his life. In a riveting struggle between love and power, John and his inner allies confront a terrifying fate that neither he nor they could have imagined. His final discovery, which brings him face to face with death itself, has the power to transform those who dare to journey with him.