What will happen if one day you die, and they tell you that you are not worthy of death, and you need to earn it? And part of your body consists of nanorobots that not only prevent you from dying, but also periodically improve you? However, this problem has faced every inhabitant of humanity. The second problem is that all the equipment died. From phone to car. And the hero is a simple office plankton. Who will ultimately have to save the world. And perhaps worlds.