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The Core Alliance could be facing a powerful new weapon against which there is no defense!

Captain Hunter is on the trail of the mysterious new faction known as the Heretics. His senior officers have reason to believe they may have been responsible for the massacre at Core Seven. When the battleship Argent encounters a formation of destroyers near the region of space known as "The Array," the captain realizes he may have found an opportunity to set things straight.

Meanwhile, Hunter's executive officer and three of his senior department chiefs are aboard a Copernicus engineering corvette investigating what looks like a colony belonging to the enigmatic Aeters. The entire planet is covered in machinery of all shapes and sizes with the apparent sole purpose of constructing even more machines!

Hunter's crew doesn't know if the appearance of the Heretics and the Aeters is somehow related. But the captain does know one thing: If the Heretics unleash their catastrophic neutron weapons on the Alliance, it could spell disaster for Skywatch!