For many millennia, berserkers—killing machines—have rampaged across the vastness of the Galaxy, spreading death everywhere. And so they met people. A bloody battle began. In battles with berserkers, people showed miracles of fortitude and courage. But there is a black mark in the family - there were both traitors and simple cowards... Cosmonaut from Earth Sebastian Gift flees during a fight with a berserker, leaving two of his comrades to certain death. Nevertheless, on the planet Yuhao he is accepted as a hero. But space does not tolerate betrayal. Gift deeply worries about his vile act...