After his ship crashed on the inhospitable planet Abyorman, Nils Kruger had spent weeks wandering across the face of the planet, suffering from blistering heat and the searing cold of an alien climate. Now he had found a fellow wanderer, Dar, an alien castaway.  They share adventure and escape and grow to know one another. They both may die – and Nils opts to do something about it. Dar, who knows the time of his death in advance, opts to do nothing. Which of them is right?  Both – or neither?