No one sees him coming. A stock-market trader is pushed from a high-rise balcony and falls to his death on the street below. The only clue the police can find is a box of matches. No one survives for long. The decomposing body of a member of the Saudi Royal Family is discovered in a car. Evidence suggests the killer took the man's life, then stole his identity, wore his clothes and lived in his hotel room - before vanishing into thin air like smoke.