The Time Hotel is the destination of choice for guests in the 41st century. The luxury establishment allows its patrons to visit notable moments in history. The Doctor investigates, time-hopping through history via several of the Time Hotel's portals — offering room service. Joy checks into a London hotel in 2024, only to discover that her quiet stay is anything but ordinary. The adjoining door to her room turns out to be a secret portal to the Time Hotel, from which a Silurian enters, carrying a briefcase handcuffed to his wrist containing a Star Seed. The Doctor follows soon after offering a ham and cheese toastie and a pumpkin latte. An old enemy of the Doctor is lurking in the wings, and Joy is in terrible danger. The sinister arms manufacturer Villengard wants to activate the Star Seed as an unlimited energy source but activating it is potentially catastrophic to everyone at every time on Earth. All of human history hangs in the balance. Destinations, danger, dinosaurs, and a deadly plan unfold. Can the Doctor and Joy save Christmas everywhere, all at once?