I know what I saw /

He smothered her, pressing his hands on her face. The police don't believe me, they say it's impossible - but I know what I saw. This is Xander Shute: once a wealthy banker, now living on the streets. As he shelters for the night in an empty Mayfair flat, he hears its occupants returning home, and scrambles to hide as the couple argue. Trapped in his hiding place, he soon finds himself witnessing a vicious murder. But who was the dead woman, who the police later tell him can't have been there? And why is the man Xander saw her with evading justice? As Xander searches for answers, his memory of the crime comes under scrutiny, forcing him to confront his long-buried past and the stories he's told about himself. How much he is willing to risk to understand the brutal truth?