A factory planet menaced by rebellion. One woman with a dangerous vision. One chance to stop her. Bruised by tragedy, Space Corps agent Elfrida Goto accepts a quiet assignment on Mercury, the factory of the solar system. But she's soon swept up in an election campaign that could lead to the evacuation of human colonists from the planet. Elfrida is torn between her loyalty to the Space Corps and her sympathy for the colonists, who've built a vibrant underground world. When violence threatens, Elfrida turns for help to a reclusive local corporation ... that's hiding a terrible secret. An alliance with criminals seems like a small price to pay, but it's not enough to stop a glamorous but malevolent candidate from stealing the election. Now, the price of peace will be even higher ... and Elfrida is the only one who can pay it. Alone, she confronts the evil power that would drive humanity out of space forever. And on a planet where sunlight itself is fatal, she has zero room for error. The third book in the Interplanetary War series brings Elfrida's battle with the AI threat to a shocking climax.