from the back of the book:
Many legends tell of the magical unicorns, those magical creatures, who are said to be powerful forces of magic and eternal life. In particular, many legends tell of their horns - the so-called Alicorn. Great magical power are said to be interred there, and some magician or alchemist leave no stone unturned to get hold of one.
In Nostria the heroes safe the life of a young hill dwarf who came into the possession of an Alicorn. But who wants to kill this dwarf in his greed? The heroes must solve the background of the assassination attempt, but do not know at the moment that their opponent will ally with hell itself.
(additional user information)
this adventure was given out for free at the Ulisses customer survey of 2011