The aliens who have arrived on Earth have started creating black holes which will allow then to travel to a different universe. You must stop them.
Notes
Part 2 of The Bottomless Pit, a sequel to Time Of The End. Mentioned in various adventure columns as both coming on the same tape as part 1 (C&VG October 1986) and also as being made available as separate games (Your Computer, Vol 6 No 10, October 1986).