Six weeks before she is due to take up her position as the first female head of MI6, Amelia Levene vanishes without a trace. Her disappearance is the gravest crisis MI6 has faced for more than a decade. There has been no ransom demand, no word from foreign intelligence services, no hint of a defection. Should news of Levene's disappearance leak out, the consequences would be catastrophic. But for disgraced MI6 officer Thomas Kell, the crisis offers a chance for redemption ...