Draco is boarding the train to leave Hogwarts for the last time when a mysterious presence finds him alone in his compartment. It’s up to Hermione Granger to save his life — and, perhaps, his soul.

Pansy, Theo, and Blaise demand an end to Draco and Hermione’s incessant competition after they nearly ruin their monthly game night. When Hermione and Draco agree on one, final competition - winner takes all - the Twelve Days of Christmas War begins.

Hermione and Draco are on a job in Paris. Mission: connect Pansy Parkinson with the plundering of unicorn hairs for use in fashion. All is going according to plan until a game of Monopoly turns into a drinking game, and Hermione is left with all sorts of feelings she'd been trying to squash for months, her very own part to play in Pansy's fashion show, and a murderer on the loose.

Hermione's nerves are on edge at the end of the war. As she plans to attend her seventh year at Hogwarts to regain a semblance of normalcy, George Weasley offers her a chance to relax before going back. What she doesn't expect is to find her peace during summer nights with a very different Draco Malfoy.