Unlikely allies Joe Miller and the crew of the Rocinante led by Jim Holden uncover more about the conspiracy to release the proto-molecule on Eros station.
The asteroid Eros takes direct collision course towards Earth. The Rocinante chases it. As last defense Earth launches missiles against Eros. Miller went inside Eros and makes a surprising discovery.
Earth is planning an expedition to the point of Eros impact. Chrisjen conflicts with Sadavir about Jules-Pierre Mao. Col. Frederick Lucius Johnson improves his position in unexpected way. New battleground is opening.
Draper struggles with what happened on Ganymede while the coming Earth/Mars peace conference tighten the tension on Errinwright. Dawes confronts Fred Johnson about what the OPA's course of action should be regarding the protomolecule.