This melodrama tells the tale of young American pilots who felt strongly about WWI before the US intervened. These men decided to do their part by working with the Royal Air Force. The German forces are using observation balloons to gather information about allied activities. Several American pilots are sent to destroy the balloons and one flier (played by Humphrey Bogart) is lost. His friend (played by Charles Farrell) says that Bogart was responsible for the success of the mission. Farrell also attempts to locate the widow of the slain flier. He finds a woman who claims that is she. The two of them begin a romance. Soon she is pegged as a German spy who has cost many fliers their lives. When the truth is discovered, that somebody else is responsible for tipping off the Germans, the young lovers are reunited.