Hope Redhood and her companions, Cor, Caniff, Castrum, Dena, Rabbit, and Rosa, are on the run from the Wizard, Teros Demond, and his terrifying daughter. Why is the Wizard willing to kill to regain his stolen gem? Can Hope and her crew escape the strange robots lurking in the tunnels beneath San Francisco? And will they survive a betrayal by the pirate captain, Bloody Gums?