Havena was once a flourishing trading metropolis, but those days are long gone. The old princely city at the misty mouth of the Great River vacillates between decay and confidence. While the sailors in Nalleshof squander their money, a few streets away in the orc village there is oppressive misery. The gloomy ruins of the Lower Town, which sank 300 years ago during the Great Flood, are still considered cursed today. Ancient secrets surround Havena, and this volume summarises them all. The book, which is intended for the game master’s eyes only, contains detailed value boxes for monsters of the Undercity according to the rules of the 5th edition of The Black Eye, secret locations with detailed floor plans and devices of the Mechanica Simiadane. In addition, there are detailed backgrounds to the mysteries alluded to in Havena Sunken Secrets, exciting adventure hooks and scenarios, as well as the fully developed city adventure Horror from the Mists: Fear reigns in Havena: sinister creatures from the depths of the sea rise from the waters at night and in the fog and lie in wait for the humans. The victims barely escape with torn clothes or find their fate in the merciless grip of wet hands. The population and the Efferd Church are in turmoil. Are the creatures a punishment from the gods? Who can put an end to the hauntings?