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On a trip to London with his daughter (Yvette Curtis) for some dirt-bike races, Dr. Matt Younger (Sidney Poitier) meets beautiful dignitary Catherine Oswandu (Esther Anderson) and quickly falls for her. But something is amiss -- strange men seem to be following her wherever she goes, and Younger assumes she's at the center of some political intrigue. His heart sinks when he learns that she has sickle cell anemia, and the men are watchdogs in the employ of her anxious father (Earl Cameron). Wikipedia