When British intelligence agent Marcus Winslow appears at Private Investigator Makana's door one April morning, Makana's life is about to change. Winslow has come with a mission: Ayman Nizari, an Iraqi scientist specialising in chemical warfare, is on the run and asking for asylum. He trusts only one man to bring him to safety: Makana. But why? And what part does Winslow have to play in this? The scientist has gone to ground in Istanbul, and Makana quickly discovers that in this place nothing is as it appears, in a case that will see his past and present collide with fatal consequences.