The guesthouse on the Moselle opens its doors. Imperial Territory of Alsace-Lorraine 1910: In the medieval Moselle town of Diedenhofen, young teacher Pauline Martin runs a guesthouse for young ladies amidst a diverse population of Germans and French, aiming to raise them to be independent and confident women. When her latest charge, Suzette, secretly meets a soldier and soon disappears without a trace, Pauline seeks help from Prussian Captain Erich von Pliesnitz. Their close collaboration threatens to break the strict conventions of the imperial era. And then there’s Pauline's new gardener, Vincent, who harbors a dark secret. Can Pauline find Suzette and preserve the good reputation of her guesthouse?.