Two action-packed science fiction works by a famous American writer highlight the problems that humanity is solving in the struggle for survival.... Only miraculously does the Pericles plane, which returned from a research expedition to Jupiter, make an emergency landing. On the way home, an unknown disease struck the whole team. In the arms of emergency doctor Sam Bertolli, a former captain - a paratrooper of mobile forces, the last surviving astronaut dies, having managed to pronounce only two words: "ship" and "danger." Will Sam be able to figure out what lies behind these words, because the future of human civilization is at stake?