A Polish journalist, Maj, who collaborates with a Parisian economic magazine similar to the UN press agencies, finds a trace of the activities of the secret organization "W", established by Nazi criminals who remained at large. The activities of this organization boil down to sabotage, attempts to obtain weapons of mass destruction, murder or drug smuggling. After the first contact in Vienna and Budapest with the activities of the "W" organization, May continues its trail, discovering new connections and carefully prepared actions. The titles of individual episodes are the names of the cities around which the action described in a given episode focuses.
