Kalla Barron is 15 years old and 4 inches tall. Were she human this would be a rather disturbing fact, however Kalla Barron is no human--she is a hidden. The hidden are a race like humans in every way, except for an obvious size disparity. Kalla lives with her family and clan in a forest, far from any humans. But the sheltered life she lived is altered forever when two humans come camping in the woods. Kalla's life may never be the same again.