In this magical novel, we first meet the heroine of several books by Fortune, the immortal and eternally young priestess of Isis - Morgan Le Fay. In one of her incarnations - a priestess who escaped from the dying Atlantis, in the other - the sister of King Arthur, known from legends as the fairy Morgan, a pupil of the wizard Merlin, who appears in this book as the Moon Priest. The protagonist of the book, on whose behalf the narrative is conducted, Wilfrid Maxwell, an ordinary English gentleman from the province, becomes, thanks to his love for the Priestess of the Sea, one of the initiates, the Priest of the Sun in the revived ancient tradition.