Thirty-four-year-old Abby Stern has made it to a happy place, with good friends, her bike, and her bike club in Philadelphia. She’s at peace with her plus-size body, at least, most of the time and she’s on track to marry her childhood sweetheart. Abby and Mark met at the weight-loss camp Abby’s perpetually-dieting mother, Eileen, forced her daughter to attend. Fifteen years later, when Abby reconnects with a half-his-size Mark, and finds out that he still adores her, it feels like fate. Yet Abby can’t escape the feeling that something isn’t right, or the memories of one mind-blowing night spent with a man named Sebastian two years ago. So when she gets a last-minute call to lead a group bike trip from New York City to Niagara Falls, Abby is happy to have time away to make up her mind. But on the first day, Abby is shocked when she sees Sebastian in the tour group. A serial dater, Sebastian is far from Mr Perfect, and Abby is determined to keep her distance, even if their chemistry is undeniable. To make things worse, Eileen, whom Abby blames for a lifetime of body shaming and insecurities, also joins the group unexpectedly. Over the next two weeks, strangers become confidantes, hidden truths come to light, and a teenage girl with a secret will unite all the riders in surprising ways, while all of Abby’s certainties about herself, her mother, and the nature of love are challenged.