According to the game's story, Sarah, the youngest daughter of the Bryant family becomes suspicious of the circumstances surrounding her brother Jacky's horrible accident in the 1990 Indianapolis 500. While investigating this accident, a mysterious group called Judgment 6 kidnapped and brainwashed her. Her innate fighting sense aroused by the brainwashing, Sarah was sent into World Martial Arts Tournament to deliver the knock-out blow to her older brother Jacky.(taken from US/European manual of Virtua Fighter)