Michael O'Shaunessey, an Irish boy living in Nazi Germany, must navigate the treacherous world of the Hitler Youth while secretly working as a spy against the regime he despises. Michael and his parents are deeply embedded agents, and he plays the part of a loyal member, participating in horrific acts like book burnings to gain access to vital intelligence. His mission becomes critically dangerous when he uncovers Projekt 1065, a secret Nazi war operation, forcing him to prove his allegiance at extreme personal risk, even if it means sacrificing his own life.

This novel is recognized for its gripping portrayal of espionage within the Hitler Youth during World War II. Critics and readers have praised Alan Gratz's ability to craft a compelling narrative that balances intense action with the moral complexities faced by young protagonists in wartime. The book is noted for its historical accuracy and its ability to engage young readers with significant historical events. It effectively conveys the dangers and sacrifices involved in fighting against tyranny.