Demon World in Danger. Its inhabitants urgently need iron, and you can get it only in the human kingdom. In exchange for the coveted metal, they send the young demon Zdim to Earth. For a whole year he must serve people and follow their orders. The demon was confident that he would cope with this mission, because it was not for nothing that he taught the language of people and their traditions in college. But the theory often diverges from practice, and it seems that Zdim did not calculate his strength. Everything that he would not undertake ends in a real disaster.