You were captured while searching for missing astronauts. The enemy put you in a time capsule that transported you to the year 2185. You must escape and return to your own time to warn your leaders of the enemy's actions.
Notes
This was published by COMPUTE! Publications as a BASIC type-in listing in COMPUTE!’s second book of Commodore 64 games, pp. 44–59 and COMPUTE!’s second book of VIC games, pp. 162–178.
Time Capsule can be downloaded here: http://www.vic20listings.freeolamail.com/book_computegames2.html#ch5sm
It needs a Vic20 with a 8Kb memory expansion.