Libby Strout was once named "America's Fattest Teen." After her mother died, Libby ate through her grief in the privacy of her own home, but after bariatric surgery and years of homeschooling, Libby is ready to tackle high school. Meanwhile, swaggering Jack Masselin, who can take apart and rebuild almost anything, hides a disability that doesn't allow him to recognize faces. When Jack and Libby are put together in the same community service group, the two grow close and learn how to be honest and to accept themselves.