In "King's Cage," the third installment of Victoria Aveyard's Red Queen series, rebellion escalates and loyalties are tested. Mare Barrow finds herself imprisoned by Maven Calore, the boy she once loved who has now become a deceiving king. Stripped of her power and haunted by her past mistakes, Mare endures captivity under the influence of Silent Stone while her allies, a group of newbloods and Reds, prepare for an impending war. Meanwhile, Cal, the exiled prince and another of Mare's love interests, is determined to rescue her. As conflicts intensify within the kingdom, the potential for destruction grows, threatening everything Mare holds dear.