Season 2 kicks off with interplanetary tensions at an all-time high, the cold war between Earth and Mars is on the brink of an all-out battle.
Unlikely allies Joe Miller and the crew of the Rocinante led by Jim Holden uncover more about the conspiracy to release the protomolecule on Eros station.
With the help of Fred Johnson and the OPA, Miller, Holden and the crew stage a raid for information on the protomolecule; on Earth, Avasarala learns a truth about Fred Johnson.
Holden and Miller butt heads about how the raid was handled.
Miller devises a dangerous plan to eradicate what's left of the protomolecule on Eros.
The Rocinante chases the asteroid Eros as it hurtles towards Earth.
Earth and Mars search for answers in the aftermath of the asteroid collision.
Preparations for the Earth/Mars peace conference tighten the tension on Errinwright.
Naomi tracks down signs of the protomolecule; Fred Johnson's control over the OPA collapses.
Bobbie becomes a political pawn in the struggle between Earth and Mars.
Holden leads his crew through the war-torn station on Ganymede.
Bobbie makes a decision that changes her life forever.
A discovery pushes Naomi and Holden apart and sets the Roci crew against each other.