If Die Mörder sind unter uns was about the ruins around then, Zwischengleis is about the ruins within, the ones that couldn’t be erased by new construction work. If Susanne back then could slowly overcome her concentration camp memories to prevent Hans from taking justice into his own hands, here Anna cannot forget that she couldn’t protect a strange boy in the mad final days of WWII when she was fleeing the approaching Soviet Army with her mother and younger brother. She’s a prisoner, caught in a timeloop in her head, it’s not an accident that her name is a palindrome. Wars take everything away from her: for her one true love Charles Stone, a colonel with the occupation forces, is sent to the battlefields of Korea, never to return.
Tras la muerte de su padre, dueño del hotel balneario Hovelman en Baviera, su hija Niddy dirige el establecimiento con la ayuda de Karl, un amigo del fallecido. Cuando su madre muere, el resto de la familia invade el hotel. Uno de sus primos finge enamorarse de ella para quedarse con la herencia. Niddy no puede negarse, pero ella sabe que ama a otro, su primer amor, Karl, su amigo de toda la vida.