After he found that behind the Indian riot in previous story sparked by Nakawa, a Huron warrior, was plotted by Nemis, an old witch that swore revenge against the Spirit-with-the-Hatchet, Zagor manages to restore peace. After leaving for a long trip to search for the sorceress' lair, Za-Gor-Te-Nay stumbles upon a mysterious stone town, where the descendants of a French expedition live like at the time of the first settlers…
Similar theme was already used by G.L. Bonelli 20 years ago in Furio "L'isola inaccessibile" story.
