He went to work. And then without a trace he disappeared.
For millions of Londoners, the morning of 16 December is like any other. But not for Sam Wren, who goes to work, gets on the subway - and never gets off. No witnesses. No footage on the security cameras.
Six months later, there's still no sign of him. The police are baffled, so Sam's wife Julia approaches David Raker, who specialises in searching for missing persons. He knows how these people think. And they also know that they have one thing in common - deeply buried secrets are the reason for their disappearances.
But Sam Wren's case is different from the others in many ways, and with each answer, it raises new questions that make Raker question everything, including his own judgment. Can Raker untangle the web of lies that have shrouded Sam Wren's life, or will they prove fatal to him as well?