Just for Tonight (1918)

Theodore Whitney, Sr. asks his son Theodore, "Ted" Jr., to search for a missing stock certificate. During his search Ted meets and falls in love with Betty Blake, the niece of Major Blackburn, whose home was recently robbed. When a detective disguised as British nobleman Lord Roxenham arrives to investigate the case, Ted bribes the officer to let him play the role for one night so that he may be near Betty. As the love-struck young man is romancing his sweetheart, Lady Roxenham suddenly arrives, alienating Betty and throwing Ted into a panic. Lady Roxenham agrees to participate in the deception, but later Ted spies her breaking into the major's safe. After he alerts the household, she and the butler are revealed as notorious thieves. As the dust settles Ted and Betty confirm their love for each other.