Translated from the back of the book:
"Deadly Wine
You know your way around Havena, the sizzling city at the delta of the Great River? Are you at home in its narrow alleys? In this adventure anthology you will meet several astonishing citizens. Leonardo, the ingenious engineer is urgently hiring. The mysterious scientist can be a valuable friend, if you can satisfy his expectations and remain calm in every situation.
'Deadly Wine' is just one of three exciting adventures of this module, containing among other things 10 maps and playable without the Havena box set."
Additional user summary
The adventures in this module are:
"Das Geheimnis des Mechanicus" ("The engineer's secret")
This is the adventure hinted at in the text from the back of the book. The heroes are hired by the mysterious engineer Leonardo to guard his workshop and his newest invention.
"Die Taucherglocke" ("The diving bell")
The heroes are hired by Leonardo again to explore the depth of the river delta.
"Tödlicher Wein" ("Deadly Wine")
A new drug is causing casualties around the city. Now it's up to the heroes to find the dealers and their suppliers.