This short uses newsreel footage, official British government film, and captured German government film to tell the story of Great Britain's defense against Germany in the early days of World War II. The story begins with the Battle of Britain, Germany's air war against England in 1940. Germany lost about 2300 aircraft, while the Royal Air Force lost about 900. When Germany realized that the war could not be won in the air, it carried out a policy of sinking virtually any ship in the Atlantic headed to England. Meanwhile, England prepared for a sea invasion on its southern coasts, determined to repel any attack. The narrator says that with the help of America, Canada, and other allies, England will not be defeated and tells Germany, "Come, IF YOU DARE!"