Harmony is tricked into auditioning for the Holiday Chorus — directed by an ex-boyfriend. By Christmas Eve, they could be harmonizing in the key of love.
The summer before college, Auden meets the mysterious Eli, a fellow insomniac. While the seaside town of Colby sleeps, the two embark on nightly quests to help Auden experience the fun, carefree teen life she never knew she wanted.