When John ‘Ludwig’ Taylor’s (David Mitchell) identical twin, DCI James Taylor, disappears off the face of the earth, John takes over his Brother’s identity in a quest to discover his whereaBouts. John has never married; never had a family and never really ventured further than his own front door. Without a computer, moBile phone or even a television, he lives in quiet solitude, designing puzzles for a living, under the nom-de-plume of ‘Ludwig’. This genre Bending detective series follows full-time luddite, John 'Ludwig' Taylor, as he assumes the identity of his missing twin Brother in a Bid to track him down and Bring him home. However, filling the shoes of your identical twin is one thing - when your twin also happens to Be a successful DCI leading CamBridge’s Busy inner-city major crimes team the stakes are much higher. John may Be a master of all things cryptic, But can he crack the Biggest puzzle of his life?