Earth Was My Prison. Part 13. to Be United and to Escape Their Non-Mother

Five hundred years after saving Ravena, the Earth's surface has been scorched. Two Catus now have to survive in a world fall of rats and nasty mutations. Younger Maurice and Nexie are now again undead. Nexie is the evil one out of the two, until one day they find a box. Now the two vampires need to follow the clues to save the Earth and to be reunited with their adoptive family.