Aster Calyx and Halan Kai Nelson are inextricably drawn to Beacon 23. Navigating one threat after another, they unravel the beacon’s mysteries, just in time to face their most powerful enemy.

Depicting an epic 26th-century conflict between humanity and an alien threat known as the Covenant, the series weaves deeply drawn personal stories with action, adventure and a richly imagined vision of the future.

An ambitious carnival man with a talent for manipulating people with a few well-chosen words hooks up with a female psychologist who is even more dangerous than he is.