A Dark Lantern

[2][3] As described in a film magazine,[4] mistaking the intentions of Prince Anton (Denny) of Argovinia in seeking her hand, young English woman Katherine Dereham (Brady) suffers a great shock when his attentions culminate in a proposal that she be his morganatic wife, his country requiring an alliance with a royal princess.

Her attitude of antagonistic exaggeration of his sternness that conceives it as sheer brutality makes her submission to the deep love he bears her a sorrowful task.

His patience at last breaks her embittered spirit and sends her to his home, willing to accept his protection under compromising circumstances.

The realness of his affection is at last revealed to her and Prince Anton, whose love for Katherine has made him risk his throne by divorcing his wife, is sent back to Argovinia.

According to the AFI Catalog, the film was shot at the Essanay studios in Chicago as that was where Alice Brady was appearing in a play at the time.

Publicity photo from a contemporary newspaper.
Ad in The Film Daily , 1920