In a world ravaged by war, Anna Berndt, a seemingly ordinary woman, finds herself thrust into the heart of the conflict. After saving a young girl named Cassy, who becomes like a sister, Anna is recruited by Officer Russell and his special team, discovering her hidden potential and facing skepticism from the all-male military. As she navigates the dangerous world of espionage and combat, Anna must protect Cassy, uncover the truth behind the war, and confront her own mysterious past and lethal capabilities.