When Rebbeca' sister Diana returns home after being away for a while things seem odd. Diana's desperately trying to hide secrets from her sister. Rebbeca takes the detective approach to work out what's going on only to find Diana Is in serious trouble. Before Rebecca could get the truth from her sister, Diana commits suicide. Being convinced her death was more than just suicide, Rebecca searches deeper for answers in effect putting her life at risk.

Mankind has lost a 300-year war against a genetically enhanced race they created and tortured. Now the descendants of that race -- known as the "ghen" -- control the planet from advanced underground cities within Hollow Earth. As rising dictator Crecilius Pryme urges his people to annihilate the remaining human population who toil in his factories above ground, a shocking secret is about to be unearthed that will change the lives of the Pryme family forever.