The story begins in the early 1980s, at the Queen's Club in London, where Mario, a young architect, meets Andrea, a journalist who is over from New York to report on Wimbledon.
The young couple go out to dinner and arrange to meet again in New York, where Mario has a scheduled business trip to view the real tennis courts of the New York Racket Club, as he is designing the Tennis and Rackets Museum in London.
Mario's hobbies are photography and camera collecting, and he frequently visits camera fairs and camera auctions, purchasing classic cameras. On one occasion, he discovers undeveloped film in a Nikon camera, which he develops himself and is shocked to find out that the photos were taken in the early 1960s, depicting the shooting of a major international crime!
Shocked and realizing the seriousness of this, he doesn't know where to turn and decides, as he has a trip planned to New York soon, to take them there and discuss the matter with Andrea, whom he feels he can trust.
In New York, Andrea becomes equally shocked when the matter is revealed and suggests that it will have to be handled with caution with people they can trust implicitly.
Further complications occur as they realize they are being followed and refrain from discussing the matter in public places, but only at her flat where, inevitably, tenderness ensues.
The story develops further by visiting the assassin's widow's house, which is in Dallas, Texas.
