Adventurer McQuade is attacked by Thugs, but Zagor comes to his aid and manages to defeat these fanatical Indian stranglers. The witch Dharma has arrived in Darkwood with a group of beastly stranglers... Zagor is motivated to stop her in her satanic plan!
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.
Zagor meets Henry Summers, a painter from Boston who wants to paint Indian culture, i.e. Indians "live". Zagor agrees to take him to Tonka where Zagor finds his old friends from the Chippewa tribe...