In the distant future, where human colonies spread among the Solar System, a distress call and the disappearance of a wealthy girl tangle the threads between a determined detective, a cargo ship captain and a diplomat trying to avoid war.
During his dangerous journey in space, Joe Miller and the crew of the Rocinante, led by Jim, discover more about the conspiracy to release the proto-molecule on Eros station, and they face great risks in trying to stop this conspiracy, while tension increases between Earth and Mars.
The ship's crew faces betrayal from Naomi following a fierce battle between Earth and Mars, and in the midst of these events, Avasarala and Bobbie devise a risky plan to escape from the enemy's clutches.
As the crew of the Rocinante embarks on an expedition to scout worlds beyond the Ring Gate, including Ilus, tension mounts among Earth, Mars, and the Belt.
Season 5 begins as many humans leave the solar system in search of new homes and vast fortunes on Earth-like worlds, and finally comes a heavy price for centuries to pay.
The pressures of war threaten to tear apart the crew of the Rocinante as they discover something amazing on a distant planet. On the other hand, Avasarala and Bobbie face massive destruction on Earth.