On this planet, scientists are . . . hated. This area is a sort of . . . reservation . . . for them. Any who are caught outside the area are killed, mercilessly, by a lynch mob. It is doubtful if the people of the planet remember why, now, but the cry of 'Havi!' is enough to rouse them - that is their name for the scientists, who are, of need, a heridatary group now. The scientists think the hatred is because they are blamed for the destruction caused by the war that destroyed the world's technology.