Victor Maynard (Nighy) is a middle-aged, solitary assassin, who lives to please his formidable mother, despite his own peerless reputation for lethal efficiency. His professional routine is interrupted when he finds himself drawn to Rose (Blunt), one of his intended victims. He spares her life, unexpectedly acquiring a young apprentice (Grint) in the process. Believing Victor to be a private detective, his two new companions tag along, while he attempts to thwart the murderous intentions of his unhappy client.
Jonathan Lynn co-created and wrote the acclaimed BBC political comedy series', Yes Minister and Yes Prime Minister. His film directorial credits include Nuns On The Run, My Cousin Vinny and The Whole Nine Yards.