A series of horrific killings on the beaches of Devon, England, leads a police detective into a darkness that goes back decades . . . A homeless man has been beaten and thrown into a fire at the seaside. To make things worse for DCI Dan Hellier, images of the crime are all over social media—and there's more to come. Soon Hellier is running through a maze that twists and turns through both a cult and the history of the Irish Troubles—to find a killer filled with bitterness and brutality, and stop yet another man from falling victim.