Ark One, a spaceship on a journey to find a new hospitable planet for humanity, suffers an unexpected disaster that causes massive loss of life. Short on supplies and its leaders dead, the remaining crew must band together if they want any chance of survival or a successful mission.

The crew struggles to establish order, while investigations uncover more questions than solutions.

The water crisis has come to a head, and a new crisis has appeared in the ship's path, loaded with both threat and promise.

When the crew suddenly begin hallucinating, their psyches are put to the test by memories of the past while they simultaneously race to figure out what's causing their mysterious symptoms.

As a radiation leak sparks crisis, there's a break in the murder investigation. Someone will have to sacrifice themselves for any hope of survival.

After identifying a planet rich in much-needed fuel, the crew devises a plan to whip around a nearby star to reach it, but things don't go according to plan.