A witness to the birth of the Universe, a cosmic exot, a giant superstring whose gravity is many times greater than the field of gravity of such monsters as Jupiter, is approaching the Solar System, attracting and breaking into pieces planets, asteroids and ... spaceships that meet on the way. A similar object, only much smaller, half a century ago already flew into the zone of human habitation, and the Earth escaped disaster. What was it then? A trial 'shot'? A test for durability? And now? Has someone decided to make sure that the space of future expansion is cleared, or is it a tragic coincidence that there are so many of them in space? These questions will be answered by Major Denis Molodtsov, the commander of the string expedition, who is ready to look for unexpected solutions in non-standard situations. Ready not to feel sorry for yourself in the name of people. Ready for anything...