Jeannine (Sylvia Syms) is a personal assistant to Madam Chen. She is the wife of a far east leader who has arrived in Paris for some diplomatic talks.
Madam Chen has bought with her a valuable pearl necklace and a bad temper. The press question her about the human rights in her country.
Meanwhile some robbers are interested in stealing the pearls. The police keep a close eye on Simon Templar, they think the Saint will be tempted.
Instead he has his suspicious eye on Jeannine. He knows she is a crook and a smart con woman.
Jeannine has plans to make a copy of the pearl necklace from a jeweller in Montmartre and switch them.
A decent crime caper with a political subtext that chimes with Roger Moore's later humanitarian work. Someone from Madam Chen's country also wants the necklace to use the proceeds help his people who are being oppressed by the regime.
The red wine switcheroo is hard to take seriously.