Hereward and Zha-rka hire a thief by the name of Rake to descend with them under the city. Hereward hopes to fulfill Bishop Montaine’s request to investigate the mysterious buried city and to find enough wealth to pay for Moxie’s resurrection. Zha-rka is finally close to finding real answers about the history of his people.
The three successfully infiltrate the ruined dwarf city only to find it is in the hands of savage frogmen! They stumble upon ominously slaughtered corpses of some kind of corrupt, dark dwarves. Sneaking about the city, they later learn that the frogmen are carrying sacks of wealth for some unknown purpose to some unknown location, but they choose to press on.
Traveling beyond the city they find a beach leading to a veritable underground ocean stretching as far as the eye can see! The darkness of the cave is pierced only by an eerie green sun that our heroes later learn is in fact a lighthouse of immense size. The sea itself is lit by a green glow and in its depths giant sea serpents can be seen undulating.
Finding a barge, they set off across this mysterious Undersea, where there are set upon by a group of living corrupt dwarf slavers they dub Dark Ones. In a pitched nautical battle, they defeat the dwarves, but Rake, while trying to swim to an embattled Zha-rka’s aid, is savagely devoured by cave sharks. Only his severed hand remains floating in a sea of blood.
Undaunted by this tragedy, our heroes press on and eventually make contact with a creature named Magwen, some sort of underground halfling. According to Magwen a whole world exists below ground! Faced with this stunning revelation, the heroes choose to fall back. They make it out of the frogman city laden with magic items—including the fabled rings of St. Kolos!—stolen from an ancient library, pursued by frogmen led by their giant, bloated king.
Back on the surface, Magwen is shocked that such a world even exists. The heroes report their discovery to Bishop Montaine and regroup.