A caravan of noble Europeans guided by the cynical “Memphis” Joe has advanced into Kiowa territory and slaughters the bison, putting the tribe's survival in jeopardy. Winter Snake, the Kiowas' sakem, is ready to attack the white men. To avoid a massacre, Zagor tries to convince them to turn back, but “Memphis” Joe captures him and Chico and feeds them to the red ants!
With 404 pages this is now longest Zagor story surpassing Una crociera misteriosa (389 pages).
