In July 1944, as the Red Army drives the Nazis out of Poland, sixteen-year-old Maria Kamińska must work with a captured Ukrainian nationalist to find her brother, who is a special operations agent and leader of a Polish Resistance squad, when he disappears while on a mission.

Poland, July 1944. Maria is making her way home after years of forced labor in Nazi Germany, only to find her village destroyed and her parents killed in a war between the Polish Resistance and Ukrainian nationalists. The local Resistance unit is commanded by her older brother, Tomek-- who she thought was dead. He is now a “Silent Unseen,” a special-operations agent with an audacious plan to resist a new and even more dangerous enemy sweeping in from the East. When Tomek disappears, Maria is determined to find him. But the only person who might be able to help is a young Ukrainian prisoner. He is the last person Maria trusts-- even as she feels a growing connection to him that she can’t resist. - adapted from jacket