On the planet Shade, The Chaons, an invading race of strange, amorphous creatures that ravenously absorb energy, have reduced the city there to a desolate ruin. Separated from the Doctor and Vicki, Steven has to join forces with an unexpected ally to find his way back to the TARDIS. Ahead, lies a nightmare journey through the dark - a test of endurance and trust. Part of "THE FIRST DOCTOR VOLUME 02" four-disc boxset.