Three and a half months have passed since Lumikki Andersson was left for dead in a snowdrift - a bullet wound in her thigh and frostbite creeping into her skin. But the scorchingly hot streets of Prague in summer provide a welcome contrast to that terrifying time, and now Lumikki just wants to move on and forget the events of the past year, forget about the Polar Bear's crime ring, and escape her parent's oppressive concern. But Lumikki's peaceful solitude is about to be shattered. She is approached on the street by a nervous young woman, who, unbelievably, thinks she might be Lumikki's long-lost sister. Lumikki is unconvinced. Although Zelenka's story seems to ring horrifyingly true there's something weird about her - something jumpy, and suspicious. Turns out Lumikki is right to be wary, as Zelenka is part of a dangerous religious cult who believe they are descendants of Christ and that Lumikki is one of them, and must be 'martyred' alongside them. On the run for her life again, Lumikki must once more draw on her all her powers of resolve and strength if she is to survive.