A unique alternate history: Newly created portals lead to an alternate reality where prehumans survived on a Mediterranean island, enslaved by local farmers. Alternate history Rome rebuilt their culture around the slaves, preserving the empire but causing it to stagnate. As a result Europeans never discovered America and American Indians still control the alternate New World.

Intertwined mysteries: When Detective Darla Smith investigates a picture of an alternate reality Roman scroll concealed on a murder victim, she is dogged by her past and other mysteries. Why did alternate timeline Rome stop changing? How did Roman slave-raiders get to alternate reality North America? What does software giant Burgen Industries want in the alternate reality?

Powerful forces headed for a violent collision: A wealthy, idealistic business woman and her menacing security chief try to sidetrack the approaching investigation. An Indian town is attacked by raiders with modern guns. The trail leads Darla and Scott through cyberspace, decaying rustbelt towns and an Indian-controlled alternate North America toward a final confrontation.