Sephy is a Cross: dark-skinned and beautiful, she lives a life of privilege and power. But she's lonely, and burns with injustice at the world she sees around her. Callum is a nought: pale-skinned and poor, he's considered to be less than nothing - a blanker, there to serve Crosses. They've been friends since they were children, and they both know that's as far as it can ever go - love is out of the question... 14+ Soon to be a major new BBC TV Series.