The Flames of Chance on AllMovie

Jack Mulhall and Margery Wilson star in this World War I drama from Triangle. Jeannette Gontreau (Wilson) goes through a Red Cross list and picks the names of three soldiers who are locked away in a German prison camp. With the help of her boss, Frederick Armstrong (Wilbur Higbee), she sends them letters and gifts. The letters that one soldier, Henry Ledyard (Mulhall), writes her become increasingly personal and romantic -- something she finds disturbing. But then by pure chance, one of Jeannette's letters is held over a flame and the soldiers discover that the paper contains secret information for the Germans that has been written in invisible ink. When Ledyard is freed, he returns to New York, where Jeannette is living. In a panic, she dresses up as an old woman to disguise herself. Ledyard informs the authorities about the secret messages and Jeannette is arrested. To save her, Ledyard takes the blame until he is able to find the person who is really responsible for the hidden messages.