Through twenty-six letters to her friend Nina, twelve-year-old Kasey chronicles the often humorous observations and impressions of her unexpected, month-long stay in a geriatric ward for the treatment of a rare but treatable bone disease (osteo-something-something-itis). Kasey tries to make her life less dull by wearing her own nightgowns, surrounding herself with her favorite stuffies and developing an unusual exercise routine. Hospital food, insomnia and the germy communal bath are enduring sources of dread, but some new (and unexpected) friends make her life bearable.