Gaby McCray is capable of the most terrible atrocities, and yet she's a gentle, loving mother and a practising psychologist too. How can she be all these things? " You're a Behemoth," the director of Ethos tells her. 'A sleeping beast... In other words, a psychopath who can switch their mania off and on at will. But you're not alone, and one day, they'll come for you - all the other Behemoth...' Gaby is horrified - and yet also...