Terror (1924)

Helen Aldrich, a young American sculptress in Paris, has an unexpected adventure with a young Apache who visits her with the intention of obtaining her jewels, changes his mind and agrees to pose for her. They fall in love. Professor Aldrich, Helen's father, is the inventor of a death ray which is expected to accomplish great things in war. The secret is stolen and Helen's lover suspected of the theft. Helen starts out to prove his innocence. She does so, after meeting with a variety of adventures, clears the man she loves and effects the capture of the gang-leader.