With 1,300 new worlds within reach, a new interplanetary land rush has started. The UN charges the crew of the Rocinante to settle a land dispute on its new colony world, New Terra, while the OPA starts transitioning the Behemoth into a gatekeeper. 

Avasarala is blindsided while visiting Mars; the Roci crew continues its protomolecule investigation as tensions between the RCE and Belters reach a tipping point. 

New alien threats emerge on Ilus as Naomi battles health challenges on the planet; Bobbie looks for a missing person on Mars; Avasarala faces a new challenge in the UN. 

Drummer and Ashford confront a dangerous person from Naomi's past; Murtry hunts down a target; Bobbie makes a life-changing confession. 

As tensions reach a boiling point on Ilus, Holden reveals a secret; Avasarala debates Nancy Gao as an emergency on the Roci forces Alex and Naomi into action. 

The Roci crew prepares for an incoming disaster on Ilus; Drummer and Ashford close in on an enemy within the Belt; Bobbie takes on a dangerous job. 

Alex and Naomi work to keep the Barbapiccola in orbit amidst a power outage; Avasarala faces a tough decision; Holden and Elvi race to find a cure for a disease spreading on Ilus. 

Avasarala faces fallout for the UN's military mission; Drummer and Ashford make big decisions about their futures within the OPA; a spreading illness on Ilus takes a toll on Amos. 

Miller and Holden race to save Ilus; Murtry puts his endgame into motion, putting the Roci crew's lives at risk. 

Ashford closes in on an enemy while uncovering a dangerous plot; Avasarala faces a crossroads in her political and personal lives; the Roci crew works to reestablish life on Ilus.