From the back, translated from Dutch by myself:
The Sea of Seven Winds knows many dangers and harbors many terrible creatures. The Sea Ogre, whose name is better not said aloud, is one of them.
A group of young adventurers has resolved to face just this monster.
The odds of them surviving an encounter with the Sea Ogre are very slim, but should they nevertheless success in defeating the menace, undying fame shall be theirs...
In the Lair of the Sea Ogre is more than an adventure for initiates among game masters. It contains a wealth of suggestions to run the game with atmosphere. The enterprise at hand is full of excitement and dangers, and forms a true challenge for any hero of The Dark Eye, so also for veterans.