What if saving yourself meant destroying everyone you love? Still reeling from everything she learned while searching for her sister in Italy, Anastasia Phoenix is ready to call it quits with spies. Then she and her friends learn that Marcus's - her kinda boyfriend - brother, Antonio, has also gone missing. Luckily, they track down Antonio in a fiery festival in England, only to learn he has been working for the enemy, Department D, the whole time. But Antonio wants out. And so does Anastasia. But before any of them can leave espionage and their parents crimes behind them, a close friend turns up dead. No one is safe, not while Department D still exists. So Anastasia and her friends embark on a dangerous plan to bring down an entire criminal empire, using every Dresden Kid they can find. As their world becomes surrounded by spies, and the children of spies, Anastasia starts to question who she can really trust. Including her best friends...