He looks at his reflection in the mirror and sees someone else's face. Who is he? He is told that his name is William Monk and that he works for the police. Carefully, by touch, he makes his way through the winding corridors of his own past - dark, dangerous, hiding many secrets. But he must hide the loss of memory and work even better than before. Monk takes on a sensational case - the murder of a Crimean War veteran, the famous aristocrat Joscelyn Gray. The investigation takes him into the houses of high society and drops him to the very bottom of the London slums. Slowly the darkness dissipates and painful memories begin. And every new turn of the investigation provides answers to questions that he longs to know, but is afraid to receive.