When a poisoner attempts to murder Surchatain Ares-again-Ares decides the time has come to step down from the throne and go underground to find out who is trying to take over the province. In his clandestine searches, he discovers a hidden room containing a vast cache of gold.
While Ares is preoccupied with establishing a link between the gold and his would-be assassin, Henry is experiencing his own torments in getting his betrothed, Ares' daughter Sophie, to agree to a wedding date. However, prompting her to act turns out to be a trivial matter compared to his discovery that the task of arranging his nuptials has been assigned to Westford's chief tormenter: his sister Renee.
"All Mirrors and All Suns" is the eighth book of the Latter Annals of Lystra, which begin with "Nicole of Prie Mer." The ninth and final book of the series is "The Laughing Side of the World.""