Immer, wenn in London ein Verbrecher getötet wird, ist ein schwarzer Jaguar in der Nähe, auf dessen Beifahrersitz stets eine weiße Katze sitzt. Inspector Higgins und Inspector Lane finden bei allen Opfern eine Joker-Karte. Ihre Ermittlungen führen sie zu einem Diamantenschmugglerring.

A rich man bequeaths seven keys to seven of his friends, but only one will unlock the door to untold wealth.

80-year-old Thomas recounts his childhood and middle age through a series of flashbacks and dream sequences. Thomas believes he’s been taken away from a better life at birth; following a hospital fire, he vividly recalls being swapped with another new-born, and subsequently grows up in a poorer neighbouring household.

Maria marries a young soldier in the last days of World War II, only for him to go missing in the war. She must rely on her beauty and ambition to navigate the difficult post-war years alone.