Winter 1943 in the Pyrenees. In the tense calm of a borderland where echoes of a nearby war arrive, live Antonio and Sara, a young couple expecting their first child. No one knows exactly what is happening or why they are fighting; surviving one more day is the priority. The arrival of a Jewish family fleeing Nazi persecution will disrupt life in the valley, filling it with unease and uncertainty. Sara must confront her own contradictions and decide whether to obey reason or what her heart dictates. The past and secrets that snow has kept buried for years are about to come to light. The cold has reached the mountains.