The World Securities Corporation is a transnational firm insuring and protecting various treasures and institutions. They are also hired by governments and private citizens alike to track down everything from caches of diamonds to nuclear weapons. The most difficult and sensitive assignments fall to the W.C.C.'s supersecret branch: Programmed Retrieval Operations, referred to as "Probe. The agents of Probe rival those of the CIA or MI-5, and are equipped with unique devices.