This book is much different than the other three in this Tanya Huff series [ Sing the Four Quarters, Fifth Quarter, No Quarter, The Quartered Sea ]. In fact, the dedication itself reads "For Alex: Not quite the sequel he wanted, but I'm afraid it'll have to do."
Please remember that this series should definitely be read in order or it can be confusing. While this one contains some of the same characters, and the premise that there are those who can Sing (and, therefore, control) air, fire, earth, and/or water, it adds a new and different character. Benedikt is only able to Sing water. Because he hasn't met the expectations of his home village, he doubts his worth; he feels inferior to his fellow bards, and isolated from them because he not only sings only one of the quarters, he is unable to Sing air -- which is the means by which the bards communicate with each other.
So when the new queen of Shkoder decides to have a vessel built for a crew that will sail into the unknown (to prove that the world is not flat and that their voyage will ultimately end up on the opposite shores of their continent), Benedikt is thrilled to be the bard chosen to sail with it. His ability to communicate with the water kigh will allow his to smooth and speed the voyage of their ship. Because of an unfortunate disagreement with the head of the school over whether the expedition should be sent at all, the bards who sing the other kigh have declined the chance to sail with the Starfarer. The lack of someone who Sings air means that the ship is soon out of range of communication. Some information gets back by water but it is often incomplete or garbled.
When a typhoon hits, Benedikt is swept overboard and is washed up on the beach of a strange new land where his appearance sets him apart from people he is saved by. He becomes a slave in a power struggle between dynasties about to change positions in the government and his situation becomes perilous. With no way to communicate his plight to those in his homeland, he must do his best to survive as he is caught in the middle -- where both sides are ruthless in their means to attain their goals. Can the water kigh find a way to communicate with the bards of Shkoder and their queen? In fact, will he be able to stay alive and sane in this new land?