In the seventeenth millennium, the New Commonality of Humankind is expanding, using newly-discovered faster-than-light travel to rediscover lost worlds colonised in the distant past. It's a time of turmoil, of clashing cultures, as civilizations shudder and collapse before the might of a benevolent empire ten millennia old. In the Solenine Cluster, things are going from bad to worse, as hyper-advanced technologies destabilise a world in chaos. Thaddeus Clay and his special ops team from the Security and Cultural Integrity Instrumentality are on the trail of the Transmigration Heresy. But what they find is something beyond even their imagining - something which could tear the whole Commonality apart!