Summer 1944.<br /><br />Max, Gerta, and their parents have abandoned their home and relocated to a safehouse in a different Berlin neighborhood. The Hoffmanns share the tight quarters with the daughter of a captured Becker Circle conspirator -- Kat Vogel, who is Gerta's age. Though they have strict orders to stay inside unless absolutely necessary, the three kids sneak out regularly, all while concocting a plan to keep the spirit of their resistance alive. They're going to burn down the headquarters of the Hitler Youth.<br /><br />Meanwhile, Claus Von Stauffenberg, a member of Operation Valkyrie's inner circle, vows to carry out the assassination of Adolf Hitler himself. And he will do it soon. Time is running out.<br /><br />The plots are carried out -- and a small, split-second decision changes the trajectory of history forever.