In sixteenth-century Mexico, a fearless young woman strives to uncover the secrets her mother kept as the last Aztec empress in a sweeping historical epic by the author of Daughter of Fire.

Tenochtitlan, 1551. Thirty years after the Spanish Conquest destroyed everything she loved, the last Aztec empress has passed and left behind a pristine yet tenuous legacy for her children. As her last will and testament is read out, her daughter Isabel suspects that another account of her mother's life may exist, hidden away, chapter by chapter, in the Valley of Mexico. Following each clue, Isabel is determined to find out who her mother really was and to discover the secrets she buried in order to survive.

Joined by her siblings and a handsome young cook named Juan, Isabel embarks on a perilous journey to piece together the past--a journey that will force the party to brave the brutal viceroyal court, face fearsome legends in mystical chinampas, and trek through desert, fire, and snow. As Isabel's feelings for Juan grow, she confronts everything she thought she knew about her Spanish father, her empress mother, and herself. Facing everything from the tunnels of ancient pyramids to the summit of an active volcano, Isabel will meet every challenge to fulfill an epic quest for the truth.