In 2012, at age 38, when she left on a reporting trip to Mongolia, Ariel Levy thought she had figured it out: she was married, pregnant, successful on her own terms, financially secure. A month later, none of that was true. In this portrait of a girl and then a young woman coming of age, Levy describes her own ill-fated assumptions: thinking that anything is possible, that the old rules do not apply; that marriage doesn't have to mean monogamy; that gender and sexuality are fluid; that aging doesn't have to mean infertility. This is a story about realizing that life is so often beyond our control, and how we forge ahead despite that. In telling her own story, Levy has captured a portrait of our time, of the shifting forces in values, women and gender in American culture, of what has changed and what has remained.