The Chelsea Flower Show is tainted by the murder of an American tourist, but when DCI David Brock’s Scotland Yard division investigates, they discover that the killer avoided having his face or his escape captured on any closed circuit cameras. What seemed a senseless but random event was in fact a carefully planned murder, but why was the victim - a retired widow traveling with a long-time family friend - worth the trouble? When a very wealthy Russian oligarch is killed in the garden of his palatial estate not far from the hotel where the murdered tourist was staying, Brock suspects that something more complicated is going on. Strong language and some descriptions of violence.