It's been known that ever since Toby, the Hork-Bajir seer, and her people started rescuing Hork-Bajir from the Yeerks that they were putting themselves at risk for re-infestation. But no one ever really expected it to happen. Now it has, and the Yeerks know where the secret Ellimist-created valley of the Hork-Bajir resides.
Jake and the other Animorphs know they have to help the Hork-Bajir. If the Yeerks captured all of them, then they'd surely learn of the Animorphs' true identity. Because of this distraction, Jake has neglected from reading an old Civil War diary bequeathed to him by his late grandfather. The diary contains an intriguing story of fighting for freedom, one which parallels the peril of the Hork-Bajir. Sometimes, history repeats itself in the most unexpected ways....