When a boy and girl awake within a stone circle, their minds are blank. They don’t know where they are, where they’re from or even who they are. Before these questions can be answered they find themselves about to be sacrificed by a Bronze Age tribe, until that is, the mysterious Foreseer arrives and saves them. From him, they discover that they are as far from home as they could be. He tells them that to return they have to steal an artifact from the vicious Beaker Tribe and restore the stone circle to its former glory. Can the children avoid all-out war and return home or will they be cast in Bronze forever?