 Oregon Highway Patrolmen Bob Colby and Jim Boone are assigned to Mount Rushmore, and confront Klee Pan, who explains that he " 'comes from Klaramar - a world revolving within an atom on the planet Saturn' " and he is looking for a stone face left on Earth millennia ago which can help prevent Saturn exploding.He reveals that an evil Faceless Hunter, Chun Yull, has planted an 'ultimate energy time-bomb' and threatened to detonate it unless he is made supreme ruler, but died giving no clues as to where the face, which can defuse the bomb, was hidden.Boone deduces that the face is on The Moon, and Klee Pan takes Colby and Boone there and then to Saturn - after cutting the face from the Moon's surface.