Sixty-five days after the death of her beloved older sister, sixteen-year-old Juniper discovers an unsent letter that Camie wrote on the day she died, addressed only to "You." Juniper is determined to honor her sister's memory and deliver the letter, except she has no idea who "you" is. The shock of her sister's secret relationship causes her to lose track of the sixty-fifth card in her Happiness Index a ritual started by sunny Camie in which Juniper is supposed to log something positive each day. It's the ritual that's been holding Juniper together since Camie's death, and without that card, there's a hole. Plus, this particular card contains Juniper's biggest secret. Juniper's search ends up taking her on a heart-opening journey that changes not just her life, but the lives of several classmates who are struggling too the anonymous author of a suicide note, a vandalizing guitar player with a troubled home life, and a boy with a secret even bigger than Juniper's.
