The tensions of war threaten to pull the Rocinante crew apart when they make a startling discovery on an asteroid. Avasarala and Bobbie contend with the devastration on Earth as Marco's rocks continue to rain down. In the Belt and on the run, Drummer and her family must make a heartbreaking decision. On Ceres, Marco and Filip's struggles turn inward.
Two hundred years in the future, in a fully colonized Solar System, detective Josephus Miller, born in the asteroid belt, is given the assignment to find a missing young woman, Julie Mao. Joining his task is James Holden, formerly first officer of an ice freighter who is involved in an incident caused by the tense relationship between Earth, Mars and the Belt. Soon the two find out that the missing woman is connected to a vast conspiracy.