Jilly's life as she knows it is about to change forever. One change is anticipated: Her mom's having a baby. The other changes are unforeseen. Her baby sister is born deaf, and her parents are struggling under the weight of this perceived challenge. But Jilly learns from her online friend -- who's also deaf -- that her family doesn't know the first thing about how proud you can be to be Deaf (with a capital D). There's a whole world of language and culture that's very different and exciting. Jilly also doesn't realize that her white family is affected by some very old racist beliefs. She's learning to navigate among people whose diversity matters, and whose differences might mean that their lives are in danger.