Trapped in the frozen wasteland of Ireland, Peter and his brother, Felix, are in a constant battle for their lives. It doesn't help that they and the other Surface Dwellers are always in fear of being abducted.

Rachel Brown lives in the Glass City, a massive city that hovers above the west coast of Ireland. But the City hides an ugly secret, even from Rachel: without the slaves from the Surface, the City would fall.

Chaos erupts when Peter is ripped from the Surface to be a slave for the mayor of the Glass City--Rachel's father--leaving Felix behind with near fatal injuries....