The Secret Signal

Set against the backdrop of World War I in rural Pennsylvania, "The Red Signal" follows Hilda Lessing, an unsuspecting young woman who becomes embroiled in a dangerous German spy ring threatening America's war effort. After a chance overhearing leads to a series of harrowing events, Hilda transforms from an ordinary girl into a vital asset in the fight for her country. As she navigates perilous challenges and pursues her mission—guided by faith and a mysterious signal—she must also confront her growing feelings for a young officer caught in the conflict. Grace Livingston Hill weaves a tale of suspense, clean romance, and the power of courage and prayer in the face of adversity.