After sixteen-year-old Alice Prewitt’s French grandmother passes away, she finds out that she has inherited an abandoned apartment in Paris. Alice travels to Paris in order to see the apartment for herself, but she makes a shocking discovery — her grandmother had a sister: Adalyn, a resistance worker during WWII. However, Alice has no idea about her great-aunt’s work, and what’s more, Adalyn’s old photos and diary suggest that she was a Nazi sympathizer. With the help of Paul, a handsome French teenager, Alice starts to uncover the truth that Adalyn took to her early grave.