From the back of the book:
The first mate drew his blade and formed up what was left of the crew. They steeled their courage and waited for whatever nightmare gave birth to the horrid noises below deck to emerge topside. When the creatures finally ventured into the moonlight, the men’s courage broke. They had never seen such otherworldly monstrosities.
The creatures ripped into their faltering ranks and slaughter reigned.
A young but literate sailor named Titus was clever enough to flee…
The Black Spot is an adventure for four to six characters of 5th level. It is a tale told in four parts and should provide sufficient adventure for multiple sessions. This adventure can be used as an excursion anywhere upon the high seas, so it could take place almost anywhere in the fantasy world of your choosing.