They have lived here since the beginning of time - wild and bloodthirsty. They killed each other for food. But then people appeared. People became their food. They are the gods of people. But when there were a lot of people, they had to hide and hide, look for slaves for themselves, so that people would continue to get them food, and in return they would give their slaves immortality. But immortality tires and drives you crazy. Immortality brings loneliness. In addition, sooner or later the servants begin to change, to resemble the masters. This gives them new abilities, but takes away the remnants of their humanity. They can either die, rising to the roofs of houses to meet the dawn, or gather in groups and feed on people, as their owners do. There is a third way - to find a replacement. But it is very difficult to explain to an ordinary person that you want to exchange immortality and invulnerability for a couple of years of life, like an ordinary person.