Set in 1963, a secret U.S. government project sends hundreds of men, women, and children on a century-long journey aboard the starship Ascension, aiming to colonize a distant world. As the crew nears a critical juncture in their voyage, the shocking murder of a young woman ignites paranoia and suspicion among the inhabitants. With their mission's purpose now under scrutiny, the residents grapple with the unsettling realization that their idyllic existence may be hiding darker truths. As tensions rise, the quest for answers threatens to unravel their tightly-knit community.