A heavy rainfall has uncovered the entrance to a previously unknown underground. Little was known about their history or origin. The city archives, however, contained a note about tribes who once inhabited these lands. According to the information contained therein, these tribes dealt with the inhabitants of the underground, whom they called the dark elves. However, there is speculation that these peoples were fraternal and even sometimes related to the inhabitants of the depths. There is probably a grain of truth in these speculations, because some local residents have a strangely dark complexion. Do the peoples of the underworld still inhabit the dark depths? Did they leave any valuable treasures behind? The heroes will have to answer these questions themselves.