Her Code of Honor is a 1919 American silent drama film directed by John M. Stahl and starring Florence Reed.

[1][2] As described in a film magazine,[3] Alice (Reed), who innocently uses a surname not her own, becomes engaged to Eugene La Salle (Desmond), whom she meets following an automobile accident.

He attends a house party at the home of her benefactor Tom Davis (Francis), a man whose love for her mother Helen (Reed) allowed him to raise her from babyhood.

On a moonlit night the passion between Alice and Eugene overcomes their patience.

However, by reason of the ring from his father Jacques (Cummings) which he exhibits, a duplicate of one left to Alice by her mother Helen, it appears that they are half-brother and sister.