Shortly before the International Rescue Team begins full-scale operation, Lady Penelope, invited by Jeff Tracy, arrives at Tracy Island and discovers the amazing technology hidden on the island, as well as Thunderbirds 1 to 5. International Rescue soon receive a call from a yeti on Mount Everest pleading for rescue, with Penelope sent to investigate. All the while, a series of robberies plagues British Stately Homes.
