When the body of a Scotsman turns up on board a Channel Tunnel train at the Gare du Nord, Parisian detective Roland Desfeuill res finds himself in charge of a murder investigation. Roland decides to travel to London -and not just in order to progress the inquiry. It's also a chance to escape his troubled marriage. Arriving in a city gripped by the financial crisis, Roland immerses himself in the victim's hedonistic lifestyle, as he searches for the motive behind the crime. But the longer he walks in the dead man's shoes, the more Roland discovers about himself . . .