Kimihiro Watanuki, the high schooler working off a wish in the service of the dimensional witch Yuuko Ichihara, is dragged along when an unsigned invitation summons her to an auction at an old mansion. The collectors gathered there vanish one by one while the owner never shows his face. With Yuuko and the archer Shizuka Doumeki, Watanuki has to work out who holds the house and what is really being sold before the night runs out. The film is a standalone story set in the xxxHOLiC continuity.