"An electrifying thriller that opens with Alan Turing's suicide, and then opens out to take in a young detective's awakening to painful secrets about his own life and the life of his country. It's 1954. Several English nationals have defected to the USSR, while a witch-hunt for homosexuals rages across Britain. In these circumstances, no one is surprised when a mathematician by the name of Alan Turing, is found dead in his home: it is widely assumed...

June 8, 1954. Alan Turing, the visionary mathematician, is found dead at his home in sleepy Wilmslow, dispatched by a poisoned apple. Taking the case, Detective Constable Leonard Corell quickly learns Turing is a convicted homosexual. Confident it's a suicide, he is nonetheless confounded by official secrecy over Turing's war record. What is more, Turing's sexuality appears to be causing alarm among the intelligence services-could he have been blackmailed...