Stolen by a group of rebels, the spaceship Mack is hurtling towards a Goldilocks planet that offers a chance to start over, to build a new Utopian society. When they arrive, the Belters, along with the earthlings, find the planet a paradise, with fertile farmland, stunning beaches, and lush forests.

But something more menacing lurks over the planet's terminator line. Every four years, Wyan's orbit plunges the planet into total darkness and the peaceful settlers are massacred by shadowy creatures that prowl the dark side of the planet.

Now, led by Lana, Marlow and the other humans must prepare to survive the darkness, save the Wyan people, and end the cycle of terror. They must fight...the Night Chasers.