You have to give director Colm McCarthy, a Scottish TV veteran making his feature film debut, and writer Mike Carey, adapting his own novel, credit for attempting the seemingly impossible task of doing something new with the zombie subgenre. And by blending it with the common YA trope of a young female protagonist who leads the world into a new revolutionary era, they almost get there—largely thanks to newcomer Nanua, who presents her character’s grappling with complex themes of identity and original sin with a childlike guilelessness.