Abertha Keir, high level witch of the Guild, and her companion, the ever-snarky Fer-Doirich, have been assigned the task of finding out what lurks beneath the waters of the San Francisco Ruins near Oakland. Yet, they soon discover that not everything is as it seems. An even bigger puzzle begins to unfold and it pushes Abertha to use skills that she keeps under wraps. What could be lurking within the ruins and just how far will Abertha have to go to stop it?