Time is running out for the Grand Human and Lemurian Alliance. The longer they take to prepare for their confrontations, the stronger their enemies become. Ready or not, they have to move - or the price in blood will break them. Matt Reddy and his battered old destroyer USS Walker lead the greatest army the humans and their Lemurian allies have ever assembled up the Zambezi toward the ancient Grik capital city. Standing against them is the largest, most dangerous force of Grik yet gathered.