John and Naomi are grieving the death of their four-year-old son from a rare genetic disorder. They desperately want another child, but they realize the odds of their next child contracting the same disease are high.

Then they hear about geneticist Dr Leo Dettore. He has methods that can spare them the heartache of ever losing another child to any disease.

At his clinic is where their nightmare begins.

They should have realized something was wrong when they saw the list. Choices of eye colour, hair, sporting abilities. They can literally design their child. Now it's too late to turn back. Naomi is pregnant and already something is badly wrong . . .