It is 1974 and the summer of love is finally drawing to a close. Tully and Kate become inseparable and by summer’s end they make a pact to be 'best friends forever’. For 30 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. They think they’ve survived it all until a single act of betrayal tears them apart.