The Aquilonian state, created from equal representatives of different times and peoples who united to pursue a better life together and to oppose the merciless Stone Age, is preparing for new trials. A signal is received that a Soviet submarine has appeared in the waters of the Black Sea—one that disappeared without a trace back in November of 1941. The crew has no chance to make the journey on their own to the vicinity of Bordeaux, where the Progressors have settled. Therefore a rescue expedition is dispatched for it on the frigate “Medusa.” But that is only the beginning… After reading this book, you’ll find out who else Aquilonians are destined to meet and what trials the mysterious intermediary intends to subject them to.