Inside the Lines

Inside the Lines is a 1930 American PreCode spy drama film starring Betty Compson, Ralph Forbes, and Mischa Auer. Directed by Roy Pomeroy who also was the associate producer from a screenplay by John Farrow and Ewart Adamson, which in turn was based on the 1915 Broadway play of the same name by Earl Derr Biggers. This version is a remake of the 1918 silent version, also with the same name. This film exists in the public domain after failure to renew the copyright afteryears.

Not fully trusting either of them, the German government has sent another agent, the Hindu Amahdi, to ensure that their sabotage plans are carried out. Both Jane and Eric believe the sincerity of the other as a German agent. When it appears that Janes attempt to destroy the fleet is uncovered, to save her, Eric takes the blame and seemingly commits suicide. However, when Ahmadi uncovers the truth that Jane is really a double agent for the British government, he attempts to go through with the sabotage. When he is about to kill Jane, Eric reappears and kills him. Jane discovers Eric is also a British double agent and they are happily reunited.The play of the same name, on which this screenplay was based, was produced in 1915 at the Longacre Theatre. ........

Source: Wikipedia