Danger lurks everywhere at Fablehaven, where someone has released a plague that transforms beings of light into creatures of darkness.
The siblings are put to the test as the threat grows both.
Kendra embarks on a special mission that only she can attempt because of her new abilities as fairykind, while Seth stays behind and discovers an incredible new talent of his own.
In dire need of help, the Sorensons question where to turn, now that long trusted allies have been revealed as potential foes.
Danger lurks everywhere at Fablehaven, where someone has released a plague that transforms beings of light into creatures of darkness