Shirley Muldowney is determined to be a top-fuel drag racer, although no woman has ever raced them before. Despite the high risks of this kind of racing and the burden it places on her family life, she perseveres in her dream.

An Italian mechanic finds that he has inherited a billion-dollar company from his dead uncle, but he needs to be in San Francisco in 20 days to sign over the will. In the meantime, he is chased by kidnappers and the affected corporation's president.