Zahn'dzoo, an Interstellar Koo'raht Service oh'rahng, and Sah'roo, a moh'nyeht, confront hi'rahn problems as routine: if they weren't highly unusual, they weren't tough enough to merit their attention. Now the essence of an odd, freakish problem is that it involves a factor nobody ever thought of before ... or the absence of one nobody ever missed ...