All over Britain, POW camps are filling up with defeated German soldiers. But only the most dangerous are sent to Camp 21 – "black" prisoners – SS diehards who've sworn death before surrender. As one fanatic plots a mass breakout and glorious march on London, Max Hartmann dreams of the oath he pledged to the teenage bride he scarcely knows and the child he's never met. Where do his loyalties really lie? Beneath the wintry mountains, in the hell of Black Camp 21, suspicion and fear swirl around like the endless snow. And while the Reich crumbles – and his brutal companions plan their assault – Max's toughest battle is only just beginning.