The technology to save the planet has finally been invented. Now the most powerful people in the world want to own it.

In 2048, climate collapse is accelerating when nanoscientist Greg Marshall creates WhiteGrass-a revolutionary technology capable of pulling carbon from the atmosphere and reversing decades of damage.

It should be humanity's salvation.

Instead, it becomes the most valuable weapon on Earth.

A secret alliance of oligarchs and political leaders moves to seize the technology through surveillance, blackmail and violence. Their ultimate weapon is a lethal humanoid android.

But the Marshalls have an android of their own.

Valada was designed to obey. Under the guidance of Greg's wife, AI expert Ginny Marshall, she begins doing something no machine was supposed to do: questioning orders, developing a conscience-and deciding for herself what is worth protecting.

Now one family stands between a technology that could save civilization and the people determined to control it.

A near-future technothriller of climate engineering, artificial intelligence, political power and the dangerous question at the heart of every transformative technology: Who gets to decide how it is used?