When Anwyn Baldomyre stumbled upon Stonegorge, he was fascinated to find an entire city built under a bridge. But the moment he stepped under its tall arches seeking shelter for the night, he knew something was amiss. Stonegorge was being ravaged by the rising river threatening to wash its foundations away, as well as a frightening creature locals call The Water Lady. A creature who drowns men on dry land. Soon, the river will tear out the foundations of the bridge. So Anwyn embarks on solving the mystery of the Water Lady and helping the folk who live at the base of the bridge known as The Depths. But there are those who would just as soon the Harper Mage not learn the truth, for that would spoil their plans to run those who dwell in The Depths from their homes and put the wealth of Stonegorge into their own pockets. But his magic may not be enough to save The City Under the Bridge unless Anwyn can solve the riddles buried in Stonegorge itself.