After one day together in 1988 upon their graduation from the University of Edinburgh, Emma Morley and Dexter Mayhew begin a friendship that will last a lifetime. She is a working-class girl of principle and ambition who dreams of making the world a better place. He is a wealthy charmer who dreams that the world will be his playground. For the next two decades, key moments of their relationship are experienced as they meet on every July 15th. Together and apart, we see Dexter and Emma through their friendship and fights, hopes and missed opportunities, laughter and tears. Somewhere along their journey, these two people realize that what they are searching and hoping for has been there for them all along. As the true meaning of that one day back in 1988 is revealed, they come to terms with the nature of love and life itself.