Sephy is a Cross - a member of the dark-skinned ruling class. Callum is a Nought - a 'colourless' member of the underclass who were once slaves to the Crosses. The two have been friends since early childhood. But that's as far as it can go. Until the first steps are taken towards more social equality and a limited number of Noughts are allowed into Crosses schools...Against a background of prejudice and distrust, intensely highlighted by violent terrorist activity by Noughts unable to accept the injustices any longer, a romance builds between Sephy and Callum - a romance that is to lead both of them into terrible danger...

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