A WWII destroyer's crew is still facing their biggest challenge as they try to survive in the next exciting book in the New York Times bestselling series in a strange new world. Commander Matt Reddy and his crew are afraid that it might finally be the end of the USS Walker. The Walker has been taking a pounding since their ship was transported to another world, and they got embroiled in a deadly conflict between the Lemurians and the vicious Grik. With Walker out of commission for repairs, Reddy takes command of another ship and joins a desperate battle to block the Grik swarm. Meanwhile, in the Republic to the South, the humans and their allies face a deadly second front. All the forces of Reddy are engaged and there is no turning back. Either they win, or they lose, anything..