The Doctor and her friends find themselves in the Deep South of America when they arrive in Montgomery, Alabama, in 1955. As they encounter a seamstress named Rosa Parks, they begin to wonder if someone is attempting to change history. They discover that a criminal from the future is trying to alter time and make sure that Rosa is never forced to stand on the bus.
The Doctor takes her companions on their first journey back in
time - to the dangerous, racially segregated world of Alabama
in the 1950s. They encounter one of the era's heroes, black
civil rights campaigner Rosa Parks, but also discover a plot
to change the course of history