The Carters' new lives are peaceful on the frontier planet, Agate, just as they hoped. Dave commutes daily to his mid-level exec post in the city and Sue counsels in their local suburban High School, much to their twin teenager’s distaste. However, tensions between humans and the K’tai are heightened over the discovery of large deposits of the precious mineral Redlazore and in the midst of diplomatic talks the K’tai invade. The invasion is unexpected, violent and chaotic. Agate becomes a battleground and the seemingly impossible mission to reunite their family and stop the bloodshed begins. But, the Carters have a past, a secret past, a past the K’tai didn’t reckon on.