June, 1954. Alan Turing, the visionary mathematician, is found dead at his home in Wilmslow. Detective 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. Corell soon becomes captivated by Turing's revolutionary work, and begins to dig deeper ... Gets the synapses sparking!