This is book 5 of The Expanse series. In this book, the social order is breaking down. With ships heading through the gate to enter new star systems to start new lives. Colonists are leaving from gravity wells for other systems, leaving Belters fearing that their livelihood will disappear. This leads to radical splinter groups forming. Some of the ships heading to the gate are disappearing, piracy and someone repurposing them is considered, the main Belter splinter group is suspected.
The Rocinante is under repairs that will take a while. Each of the crew takes this opportunity to go address personal issues, each heading in a different direction and each providing a different story.
James Holden remains on Tycho Station and bides his time investigating the disappearance of Monica Stuart.
Alex heads off to Mars to resolve some issues with his ex-wife and to see friends. His ex refuses to talk to him, so he spends a lot of time with Bobby. Bobby is looking into the disappearance of military equipment, including full ships.
The leader of the radical splinter group, Marco Inaros, happens to be a former husband to Noami Nagato, and is turning their son, Filip Inaros, into an active terrorist. Filip led a raid on a Martian outpost to steal some stealth paint. Marco then used that to hide asteroids and then bombard Earth.
Each of the crew ends up getting caught up in the terrorist story from different angles. Noami ends up with Marco, who tries to turn her to his cause. Alex and Bobby are investigating missing Martian ships, sent to search a hiding ship, discover a large fleet owned by Marco. Amos gets caught up in the bombardment on Earth and ends up rescuing Clarissa Mao.
Clarissa becomes a de-facto member of the crew, much to Holden’s chagrin. She seems to fit in and apparently has more control over her emotions and doesn’t use her abilities.
All the main characters make an appearance in this volume. It makes for an excellent story.