In the turbulent summer of 1974, Kate Mularkey has accepted her place at the bottom of the eighth-grade social food chain. Then, to her amazement, the “coolest girl in the world” moves in across the street and wants to be her friend. Tully Hart seems to have it all---beauty, brains, ambition. On the surface they are as opposite as two people can 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 that is destroying her. They make a pact to be best friends forever; by summer’s end they’ve become TullyandKate. Inseparable.

Once, a long time ago, I walked down a night-darkened road called Firefly Lane, all alone, on the worst night of my life, and I found a kindred spirit. That was our beginning. More than thirty years ago. TullyandKate. You and me against the world. Best friends forever. But stories end, don't they? You lose the people you love and you have to find a way to go on. . . .