It wasn't so much that Christmas Calvert liked killing people, he was just very good at it. A crack shot, he also possessed an unnatural ability to distance himself from his actions, shut off all emotion when 'vanishing' his targets. His exceptional shooting skills soon brought him to the attention of Colonel Dansey, and when an RAF doctor classified Calvert as 'remarkably amoral', Dansey was left in no doubt that he had found a new recruit for The Button Squad. An elite team of highly trained killers, The Squad were all RAF personnel but answered only to Dansey and his second-in-command, Sergeant Pollard. In the early years of World War II, when Calvert joined their ranks, the murkier realms of military intelligence occasionally had reason to call upon Dansey's team for a little discreet murdering, and Calvert soon distinguished himself as one of the most reliable vanishers. But murder soon takes its toll, even for a natural killer like Calvert. Now, over fifty years later, Calvert is an old man and weary with the ways of the world. A man who's seen too much death, too much deception.