In London, Paul Aston, a young MI6 agent, is sent to investigate a terrifying explosion. Nnothing could have prepared him for the scenes of horror and devastation he sees, images that will haunt him for the rest of his life. The government blames MI6, MI6 blames the government, but the truth is more chilling than anyone could have thought. Slowly, Aston tears away the layers of corruption, betrayal and murder to reveal the real culprit. Someone who knows every trick in the book, because he's played every one of them. Someone that has a deep seething hatred of MI6 and will stop at nothing until his enemies are brought to their knees. He is The Mentor.