Decades ago, a fire broke out in the tunnels of a coal mining area - and the flames still blaze underground. Margarete and Fritzi are the last remnants of youth in a vanishing town. Their legacy is nothing but a desolate landscape marked by devastation. Previous events are only partially recorded. However, the two sisters refuse to accept this state of affairs. Determined, they set off on an expedition to explore their own origins. For only those who know their history can build a hopeful future. With the rediscovery of a long-forgotten river, a new life becomes tangible for Margarete and Fritzi. Finally, there is also a reason to send out invitations for a grand celebration: "Come on your bicycles! Come riding on your white horses!" Dorothee Elmiger dares to do this.