It is 1974 and the summer of love is finally drawing to a close. Kate Mularkey has accepted her place at the bottom of the secondary school social food chain. Then, to her amazement, the 'coolest girl in the world', Tully Hart moves in across the street and wants to be her best friend. Tully and Kate became inseparable and by summer's end they made a pact to be 'best friends forever'. For thirty years Tully and Kate buoy each other through life, weathering the storms of friendship, jealousy, anger, hurt and resentment. Tully will follow her ambition to find fame and success. Kate knows that all she wants is to fall in love and have a family. What she doesn't know is how being a wife and a mother will change her.