When Dash finds an unmarked, red notebook in his favorite bookshop, he must follow a series of clues to figure out who the mysterious writer might be. (imdb)

Lily loves Christmas, but the prospect of a lonely holiday inspires her to connect with Dash through a notebook - and send him on another dare. (imdb)

During one of their notebook exchanges, Lily tells Dash about the worst Christmas she can remember. Dash then dares her to attend a wild, underground Hanukkah dance party, intending to push her far outside her comfort zone. (wikipedia.org)

Dash finds Lily's boot but learns she forgot to leave the notebook at the party. After reading her unhappy response to his mirror message, he attempts to track down the boot's owner. (wikipedia.org)

Dash and Lily hesitate to tell each other about the returns of Sofia and Edgar, respectively. (wikipedia.org)

Real-life distractions complicate Dash and Lily's letter-based relationship when they both decide to attend a holiday party with other people. (netflix.com)

Lily awakens on Christmas morning, hoping to find the notebook under the tree. (wikipedia.org)

On New Year's Eve at the Strand, store clerk Mark gives Dash the notebook with a message from Lily, telling him she agrees their relationship would have never worked and that her family is soon leaving for Fiji. (wikipedia.org)