n its introduction, Oliver claims that the book had been channeled through him via automatic writing, visions and mental "dictations", by a spirit calling himself Phylos the Thibetan who revealed the story to him over a period of three years, beginning in 1883.

Concerning itself with Atlantis, it portrays a first person account of Atlantean culture which had reached a high level of technological and scientific advancement. His personal history and that of a group of souls with whom Phylos closely interacted is portrayed in the context of the social, economic, political and religious structures that shaped Poseid society. Daily life for Poseidi citizens included such things as antigravity powered air craft and submarines, television, wireless telephony, arial water generators, air conditioners and high-speed rail. The book deals with deep esoteric subjects including karma and re-incarnation and describes Phylos' final incarnation in 19th century America where his Atlantean karma played itself out. In that incarnation (as Walter Pierson, gold miner and occult student of the Theo-Christic Adepts) he travelled to Venus/Hysperia in a subtle body while his physical form remained at the temple inside Mount Shasta. Describing his experience with the Hesperian adepts, Phylos relates many wonders including artworks depicting 3D scenes that appeared alive. He saw a voice-operated typewriter and other occult and technical power. Some devices mentioned have become reality (such as the TV and the atomic telescope).

In a detailed personal history of Atlantis and 19th century North America, Phylos draws the threads of both lifetimes together in familiar and initiatic terms revealing equally their triumphs and failures and exposing the cause and effects of karma from one lifetime to another. His life story is written in personal testimony of the law: "whatsoever a man soweth, that shall he also reap" and as a warning to this technological age to not repeat the mistakes of the past that led to the cataclysmic destruction of "Poseid, queen of the waves".