From the back cover:
The Royal Forest, near Marvalar, has always been a peaceful place to live. Until now. This tranquility is disturbed by a series of abductions by an army of goblins especially cruel and disciplined. As if that were not enough, a strange curse is decimating the population of the nearby town of Castamir, making its inhabitants flee in terror.
What dark truth hides behind these events? It is time for a group of heroes to step forward and face the unknown ... to what the eye does not see.
"What the eye does not see" is a module for Adventures in the East Mark designed for a party of 1-5 adventurers of levels 1 and 2.