Detective Inspector Kieran Shaw is not interested in the infantry. He likes the proper criminals, the ones who can plan things. As head of Operation Perseus - a covert police investigation into a powerful criminal network - Shaw is about to make the arrests of his career. But then the brutal murder of a teenager sends a shockwave through the very organization he has been targeting, threatening not only Shaw's case, but everyone with a connection to the boy who was killed on Gallowstree Lane...