Kaehl and Selda have found healing, happiness, and new friends in the utopian land of Alizon, guardian of Welltower's secrets. They have also found new foundations for their lives and a desire to give back. But all is not as it seems. Alizon has its enemies, too, and once more the brother and sister team must descend into the depths of Welltower to solve its deadly mysteries. Torn apart by their new missions, they quickly find themselves mired in the moral and physical decay of their dying city. Traveling separate paths, they both find new strength and abilities as they battle the Tower's corrupt elite, racing for their lives against disease and unexpected disaster in the looking-glass world called Welltower.