From #1 New York Times bestselling author Alan Gratz comes a gripping, 80-page bonus story about D-Day that can be read alongside the novel Allies, or on its own!

Samira Zidane lives in Nazi-occupied France during World War II...and she has a secret. She and her mother are spies for the underground resistance. They crack codes and trade messages that will help sabotage the Nazis' plans.

When her mother is captured by enemy soldiers, Samira must travel through the war-torn countryside on a desperate and daring rescue mission.

And today just happens to be D-Day: the pivotal moment when Allied soldiers are landing in France. Battles rage all around her, and Samira only has a small dog named Cyrano for company. Can she find a way to save her mother before time runs out?