In Nazi-occupied Paris, Christian Dior fears for his resistance-fighter sister, Catherine. Coco Chanel makes a deal that will forever haunt her.

Christian embarks on a quest to free Catherine from German captivity. Coco is sent on an undercover mission and recruits her friend Elsa.

Coco suffers the consequences of her relationship with Spatz. Christian's pursuit of Catherine takes a fatal turn.

After Paris is liberated by Allied troops, Nazi collaborators face punishment—including Coco. Christian is conflicted about ever designing again.