Ginny Mathis had no intention of staying rooted in the Outer Banks -- then war broke out. While working as a clerk for Oregon Inlet ferry, naval officers ask her to be watchful for German U-boats reportedly spotted in the area. To help occupy her younger sister, Ginny enlists the Girl Scout troop she leads to help watch for suspicious activity. Soon the girls are sneaking around, hiding a shipwreck survivor. Ginny must take charge, but is this man the enemy, or does he hold secrets that could turn the tide of the Battle of the Atlantic in the allies' favor?