It is based on the 1949 book The Story of the Trapp Family Singers by Maria von Trapp. Set in Austria on the eve of the Anschluss in 1938, the musical tells the story of Maria, who takes a job as governess to a large family while she decides whether to become a nun. She falls in love with the children, and eventually their widowed father, Captain von Trapp. He is ordered to accept a commission in the German Navy, but he opposes the Nazis. He and Maria decide on a plan to flee Austria with the children. Many songs from the musical have become standards, including "Do-Re-Mi", "My Favorite Things", "Edelweiss", "Climb Ev'ry Mountain", and the title song "The Sound of Music".