Mercer is a hunter of wyverns, vicious creatures of the old race that feast on all that lives and prospers in the world. Lena is an heiress in a time when vampires are dying out because of a mysterious illness. The bond forged between these two unlikely people could become the beacon of light in a slowly decaying world or the catalyst that gives rise to the eternal darkness threatening to revolt from the shadows.

All is not as it seems, and Mercer must learn to navigate the subtle nuances of another culture while also trying to stay true to her own ideals. Together, they will forge new alliances in the spilled blood of the hunt, where competent companions are the difference between a knife in the back and a fat paycheck.