After the events of last fall, Katherine Nolwood thought that the mission was over. Her best friend was back, her secret agent was gone, and she was a normal girl once again. Graduation had just finished, and she was looking forward to one last free summer before college started.

Then a letter arrived asking for her help in a matter of national defense. There was no signature, but there didn't need to be one.

Katherine knew exactly who the letter was from. What she didn't know was that her secret agent wasn't the only one interested in her.

There were more dark forces at play here, and there was one secret that just might spell her end.