Dean Parker thought he was going to coast into retirement. He was wrong. Things have slowed down for Dean and Mary as they manage the expanding human colonies on Haven, New Spero, and Earth—until they receive a distress call from the Keppe. Magnus and Natalia are in the midst of a three-year exploration mission on the alien vessel, but mysteriously vanish with less than a year left to go. With no one else to call on, Dean, Slate, and Karo, the last remaining Theos, commence the search for the missing ship. When their wormhole drive malfunctions, they end up stranded, with no way to return home. Join the journey as Dean Parker fights to rescue old friends while forging an unlikely coalition.