Cardinal Mercier protects the altar of his church from desecration when German forces invade the Belgian city of Louvain during World War I. Although the soldiers commit widespread atrocities, the cardinal does his best to protect the townspeople.
| Actor | Role |
|---|---|
 Montagu LoveCardinal Mercier | Cardinal Mercier |
 Jeanne EagelsLiane de Merode | Liane de Merode |
| TTony MerloLt. Maurice Lambeaux | Lt. Maurice Lambeaux |
 George MorganGaston Van Leys | Gaston Van Leys |
 Edward ElkasBanker Van Leys | Banker Van Leys |
| CCharles BrandtBaron Spiegelman | Baron Spiegelman |
| EEloise ClementJeanne Perrier | Jeanne Perrier |
 Al HartColonel Krause | Colonel Krause |
 Alec B. FrancisBrother Joseph | Brother Joseph |
 Kate LesterThe Cardinals Housekeeper | The Cardinals Housekeeper |
| FFanny CoganMadame Lambeaux | Madame Lambeaux |
| HHenrietta SimpsonMadame Van Leys | Madame Van Leys |