In 15th-century Rome, Cesare Borgia uses his sister Lucrezia as a political pawn, marrying her off to various noblemen to help unite Italy.
Maryse blackmails her former lovers by threatening to mention their names in her memoirs. But a real blackmailer appears and cashes the checks for him.
Robert Shaw slaughters his wife's lover and runs away with his secretary Jacqueline. Helped by a French trapper who takes them for film-makers, they hide in Northern Canada.