検索キーワード： 制作 "Penguin Audio" SF

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.

For the last 16 years, Eve has been a prisoner. Guarded by the Mothers. Trapped by her fate. Watched by the world. Until she took her chance, and escaped. Eve finally has the freedom she has wanted for so long and with Bram she has the love. But both come at a price. In this dangerous new world beyond the Tower, the regime are only ever one step behind. And together with the desperate rebel group fighting against them, Eve has found herself in more danger than she ever could have imagined.