While Claude Monet paints the wintry mists over the Thames, the bodies of two young women are dragged from its murky depths, arousing fears of a return of Jack the Ripper. Craston, a green diplomat at the Foreign Office, is unwillingly drawn into the police investigation and ordered to keep an eye on the visiting French artist. All the while, neither man knows that the source of the horror stalks the floor above M. Monet's suite..."