In season one, the disappearance of rich-girl-turned-political-activist Julie Mao linked the lives of Ceres' detective Joe Miller, accidental ship captain James Holden and U.N. politician Chrisjen Avasarala. Amidst political tension between Earth, Mars and the Asteroid Belt, these three individuals unravel the single greatest conspiracy of all time.
In the outer solar system near Saturn, James Holden and the crew of the ice freighter Canterbury investigate a distress call from a mysterious derelict ship, the Scopuli. On Ceres Station, Detective Miller begins an off-the-books investigation of a missing heiress, Julie Mao.
Holden and crew are trapped in a badly damaged shuttle. On Ceres, Miller uncovers clues about Julie Mao. On Earth, Chrisjen Avasarala questions a terrorist.
While Avasarala plays a dangerous game of politics, Holden and his crew begin to turn on one another while held captive by the Martian Navy.
Holden and crew are caught in the middle of a desperate battle, as mysterious warships attack and board the Donnager. As Miller continues to investigate Julie Mao, his partner Havelock continues to go missing.
The crew has survived the loss of the Canturbury and the Donnager and are contacted by an unlikely ally. Miller, on Ceres, continues his investigation and his thoughts of a conspiracy grow.
Holden's team makes an uneasy alliance with Fred Johnson while Miller fights for his life against Anderson Dawes' thugs.
Holden and his crew face a Martian military blockade. Miller finds a new reason to forge ahead. Avasarala visits Holden’s family.
A derelict vessel holds a potentially devastating secret. Holden and his crew cross paths with Miller on Eros. Avasarala receives bad news.
Miller, Holden and his crew are trapped on Eros. Avasarala discovers the origin of the mystery ships.