Louise and her reluctant familiar Saito Hiraga return as the kingdom of Albion, backed by the mysterious organization Reconquista, declares war on Tristain. Louise's long-dormant Void magic finally awakens in the chaos, letting her turn the tide of battle almost single-handedly, while Saito is drawn deeper into the political fallout among Tristain's nobility. This manga sequel to Zero's Familiar adapts volumes five through seven of the original light novels, carrying Louise and Saito from academy life into full wartime conflict.