 Donna, a middle aged woman who is on the verge of marrying her fiance; Lance finds herself somehow transported within an immense spaceship. That spaceship of course being the TARDIS. Much to the shock of the obnoxious Bride as well as the Doctor who has just recently had to get over the departure of Rose Tyler. The Doctor learns that Donna is in some way linked to an alien threat to destroy the planet, Earth. With time ticking away and the Doctor having to face off against a small army of robotic Santa s once again. Can he prevent the evil Empress of Racnoss s plot to eradicate the world?