8, 000 years ago Europe was a very different place, as the landmass of Northland still sat in what is now the North Sea. But what if a wall was built to keep the sea out? So begins a colossal engineering project that will take decades, a wall that becomes an act of defiance, and containing the bones of the dead, an act of devotion. A wall that will change the geography of the world. This is an eye-opening look at what could have been and an inspiring tale of how we control our future. Alternative history at its most mindblowing.