The French Riviera, 1956: The invitation to dinner was not unexpected, though neither was it welcome. Ernst Mielke, deputy head of the East German Stasi, has turned up in Nice, and he's not on holiday. An old and dangerous adversary, Mielke is calling in a debt. He intends that Bernie go to London and, with the vial of Thallium he now pushes across the table, poison a female agent they both have had dealings with.