The Skida tribe kidnaps young squaws from other tribes and sacrifices them to their deity, the Morning Star. The latest victim is Zanya, daughter of Red Shield, a Cheyenne witch doctor. But Zagor and Chico are already on the trail of the kidnappers...
A mysterious dream forces Zagor to travel to an Indian village on the Atlantic coast, to meet with a young sorcerer, also troubled by anxious prophecies... It seems that Stephan, a priest of the dark cult of the demon Haggoth, has returned...
An alpinist expedition crosses vast prairies on the way to Mount Lej. Zagor discovered that someone from the expedition was trying to kill the other members. Following a team of alpinists, he and Chico reach an impregnable mountain, a real stone giant.