Keaton Taichi Hiraga is a half-British half Japanese dreamer whose dream is to dig up an ancient civilization on the Danube River. But after his marriage failed, he also lost his confidence in his dream. He joined the SAS army but he couldn't give up his archaeological desire. So he became an "op" (operative) in order to finance his future private excavation of the secret civilization. So now he goes around the world as an insurance investigator for Lloyd's of London.
Episodes range from murder mystery to anti-terrorist activities with occasional
archaeological/zoological or family interests. As the subject matter is broad and often takes place in Europe (occasionally in Africa or Middle East and Japan), this show does a wonderful job of accurately portraying the areas visited.