In Proxima's Dark Harvest, humanity embarks on its first voyage to Proxima B, only to uncover a world steeped in mystery and terror. The Ithar, a seemingly peaceful, agrarian people, hide a chilling secret: they are prey to the Kethar, an advanced alien race that returns once a year to harvest their young for sustenance. When astronaut Ethan Carter falls in love with Naia, an Ithar woman, and learns of the gruesome cycle, he is thrust into a desperate battle for survival. As the crew fights to protect the planet, they realize the Kethar's return is inevitable unless Earth intervenes. With time running out, humanity must decide: will they stop the cycle, or let it continue at the cost of the Ithar's-and possibly Earth's-future?