"The audacity!" Roberta 'Bobbi' Gibb had just received a nine-word slap to the face: "Women are not physiologically capable of running a marathon." That was the reply she received when she applied to enter the Boston Marathon. She crumpled the letter and threw it on the floor. Bobbi knew she’d be running the race - whether they let her or not.

This is the story of one woman’s battle against derogatory sideswipes and archaic attitudes, and how far she went to remove the barriers that kept women from running practically every marathon in the world.