When Man Is the Prey(1972)

After a year in Europe, the young Samantha, daughter of a prominent American politician returns home. She is convinced that she was sent home because she was romantically linked to Nat Brook, a black revolutionary. After one of his numerous protests against violence, Nat feels he is being followed by two men sent by her father . But in the duel that follows the young revolutionary knocks out the two stalkers . Then he breaks it off with Samantha because, beyond the his feelings for her, she is starting to feel like a burden to his protesting activities.