To the people around them they were known as KateandTully or the Firefly Lane Girls. A single, inseparable unit. On the surface they were as opposite as two people could be: Kate, doomed to be forever uncool, with a loving family who mortifies her at every turn. Tully, steeped in glamour and mystery, but with a secret home life that is destroying her. Yet they are best friends who swear they'll be there for each other, and for thirty years that promise...