Ancient Echoes tells the story of Jack Chatwin, an Englishman from Exburgh.
Jack has been having strange recurring dream-like visions, during which his body shimmers, since his teens, a phenomenon that fascinates his friend Angela. They later marry and have a daughter, Nathalie.
In his visions, Jack dreams of a parallel world where two hunters, a woman and a man, are running from a deathly danger. When these ask Jack for help, Greyface threatening to harm Nathalie, Jack decides to enter a computer-monitored trance, under the supervison of Angela and her ex boy-friend Steve.
Although Ancient Echoes isn't part of the series, it is nonetheless very similar in style and theme to the latest Mythago books. That is, except for a couple of passages in the middle, where Jack spends time with a prehistoric tribe and gets to meet one or two interesting characters, rather boring and tedious as a whole.