Ally Darling embarks on a quest to find the best "ex" of her life, by any means necessary, when she reads a magazine article warning that people who have had 20 or more relationships have missed their chance at true love. Ally is an original modern heroine. She is smart, attractive, funny and romantic – a young woman trying to figure out who she really is, as well as whom she should be with. While her quest to find her best "ex," or former boyfriend, is triggered by a magazine article, it also signifies something more: Ally is at a point in her life when she doesn’t have the husband, job or life she thought she’d have. She is at a crossroads, which leads her to wonder if she has missed something – or someone – important during the past decade.