From the author of Genesis and August comes a new psychological thriller that questions what makes us who we are. Rene's twin brother Theo lies unconscious in hospital after a freak accident left him with massively disrupted brain function. There is hope, though. An experimental procedure—risky, scientifically exciting, and ethically questionable—could allow him to gain a new life. But what life, and at what cost? Only Rene can give the required consent. And now he must face that difficult decision. But first there is the question of Rene's capacity to make that decision. And this is where the real story begins.