Already jealous that, late in life, her brother Bill married the younger, German-born piano teacher Hertha, Marjory Clifford's resentment grows as she sees them befriend young officer Helmut Wolf, a piano student of Hertha's. She writes an anonymous letter, accusing Hertha of black market activities after she sells cigars Helmut gave her. No evidence is found but Richter, aware that Reinicke dislikes Helmut, sends him to the mainland to save him whilst Bill is interned, along with Hertha, after Marjory's meddling leads the Germans to discover that he was born in England, not Guernsey.
—don @ minifie-1