In Carrhen some people have a magic power - they may be telekinetic, clairvoyant, stealthy, or able to manipulate the elements. Anarya is a Sponger, she can absorb and use anyone else's magic without them even being aware, but she has to keep it a secret as it provokes jealousy and hostility especially among those with no magic powers at all.
When Anarya sees Yisyena, a Sitrelker refugee, being assaulted by three drunken men, she helps her to escape. Anarya is trying to establish herself as an investigator, a quaestor, in the city of Carregis. Yisyena is a clairvoyant, a skill that would be a useful asset for a quaestor, so Anarya offers her a place to stay and suggests they become business partners. Before long they are also lovers.
But business is still hard to find, so when an opportunity arises to work for Count Graumedel who rules over the city, they can't afford to turn it down, even though the outcome may not be to their liking.
Soon they are embroiled in state secrets and the personal vendettas of a murdered champion, a cabal, a puppet king, and a false god looking for one who has defied him.