Follows the discovery of a massive alien gate in Uranus's orbit that is examined by Jim Holden and the crew of the Rocinante, who are placed in mortal danger by a complex human plot The third novel in Corey's Expanse series. Jim Holden and the crew of the Rocinante are part of a vast flotilla of scientific and military ships going out to examine an alien artifact. But behind the scenes, a complex plot is unfolding, with the destruction of Holden at its core.