The Estrella Grand is a self-constructing luxury hotel, designed by Brains, which orbits around Earth. The hotel suffers a mysterious hull breach that will not repair itself causing it to begin to fall to earth. Thunderbirds 2 and 3 are launched to rescue the guests including Lady Penelope and Parker. Kayo flies with Thunderbird 3 to board the hotel in search of a saboteur. Note: This episode is a homage to the original Thunderbirds episode, Ricochet (satellite crashing to Earth).