A young woman finds out that her mother worked as a spy for the British Secret Service during World War II and has been on the run ever since.

In 1923 British Colonial Nigeria, Mister Johnson is an oddity -- an educated black man who doesn't really fit in with the natives or the British. He works for the local British magistrate, and considers himself English, though he has never been to England. He is always scheming, trying to get ahead, which lands him in a lot of hot water.