The subject of this film is the new sport skyrunning, the high altitude race. The sport, races and medical research accompanying the project are dealt with on equal terms. The scenes include the Alps, Colorado, Kenya and Tibet and also laboratory research. The film focalizes on the limits of human performance in sport at high altitudes. The message that is transmitted is the sportive-scientific aspects of this sport, without forgetting its ancient origins. What our grandfathers did to survive, hunting, smuggling, etc., has today turned into a sport and the film evidence of this.