As the U.S. is brought to its knees by an unstoppable enemy, the six survivors of The Cave struggle to stay alive as the final battle begins. Kate is badly injured and flees to safety, hoping to repair her wounded legs and her heart. Percy has distanced himself from Kate in order to spend more time working in the governmental lab with his uncle. Ano and Jazz are reunited only to find that the war being waged might be closer to home than they think. Carlie and David are on the front lines where the heaviest firefight is being waged. With freedom comes sacrifice. Finish the journey with Kate, Ano, Carlie, Jazz, Matt and Percy in the gripping conclusion of the Wind Cave series.