Sherry has struggled all her life to understand who she is, where she comes from, and, most importantly, why her mother slapped her cheek one summer afternoon. The incident has haunted Sherry, and it causes her to dig into her family's past. Like many family histories, it is fractured and reluctant to reveal its secrets; but Sherry remains determined. In just a few days' time, her extended family will gather for a reunion, and Sherry sets off across the country with her mother, Dumpling, to join them. What Sherry and Dumpling find on their trip is nothing less than the assorted pieces of their family's past.