The sixth and final season of The Expanse picks up with the solar system at war, as Marco Inaros and his Free Navy continue to launch devastating asteroid attacks on Earth and Mars. As the tensions of war and shared loss threaten to pull the crew of the Rocinante apart, Chrisjen Avasarala makes a bold move and sends former Martian Marine Bobbie Draper on a secret mission that could turn the tide of the conflict. Meanwhile, in the Belt, Drummer and what's left of her family are on the run after betraying Marco. And on a distant planet beyond the Rings, a new power begins to rise.

In different parts of the Solar System, the crew of the Rocinante and their allies confront the sins of their past, while Marco Inaros unleashes an attack that will alter the future of Earth, Mars, the Belt, and the worlds beyond the Ring.

本季将揭开全新篇章，“如今是改变和挑战、希望和恐惧、知识和无知并存的时代。”

罗西南特的船员们接到任务：探索星环之门外的新世界。