He is a legend. She is a prodigy. Who will be champion? June and Day have sacrificed so much for the people of the Republic - and each other - and now their country is on the brink of a new peaceful existence. June is back in the good graces of the Republic, working within the government's elite circles while Day has been assigned a high-level military position. But when a plague outbreak, deadlier than any other, causes panic in the Colonies, and war threatens the Republic's border cities, the two are thrown back together. June is the only one who knows the key to her country's defense. But saving the lives of thousands will mean asking the one she loves to give up everything he has.