In Compound Eleven, freedom from tyranny is impossible.

My name is Eve Hamilton, and I’ve managed the impossible.

I am free.

Until just like that, it is wrenched from my grasp. And this time, the corridors of the dark underground city are even more dangerous than ever before. But my brief taste of freedom has left me with something useful, something powerful, something that terrifies the leaders of Compound Eleven.

And now I have a monster inside.

One I’ll need to learn to control, and fast, or I’ll lose everything and everyone I hold dear. Starting with Wren Edelman. The one boy who has taught me that anything is possible if we stick together.

But will that matter if I become the very thing he fears the most?