Holden and the Roci face off against Marco’s forces and Drummer, while Alex and Bobbie attempt a dangerous rescue of Naomi, and the balance of power in the Solar System…

Amos, Clarissa, and a gang of thieves work together to leave Earth. Avasarala tries to head off a brutal military strike. Drummer’s new family bonds are tested as Naomi’s life…

Amos returns to Baltimore with Clarissa. On Luna, Avasarala’s alliances begin to shift. Alone and adrift, Naomi becomes a deadly lure.

Naomi makes a desperate attempt to save her son from Marco. On the Roci, Holden battles for the last sample of protomolecule.

Naomi comes face to face with Filip. Holden and Fred turn the tables. Avasarala closes in on Marco’s plot.

Holden tries to convince Fred Johnson to destroy the last sample of protomolecule. Naomi gets an important lead to her son. On Luna, Avasarala begins to hunt for Marco Inaros.