At 15, Lene is questioning everything. She is sick of the compulsory League of German Girls meetings, and everyone being made to fight for a final victory that never seems to come. She is in love with Ludwig who lives upstairs and listens to enemy broadcasts. Like Lene, he rejects the war and the endless Nazi indoctrination. But he has caught the attention of his ruthless Hitler Youth squad leader, Kurt.
Unwittingly drawn into a dangerous game of cat and mouse, Lene has to watch every step, every word to protect those she loves. When Ludwig is ordered to the Eastern Front, can Lene and Ludwig hold on to their promise to one another and resurface from the darkness of the abyss in post-war Berlin?