Two celebrities and a member of the public take a trip to the planet Arg - sometimes willingly, sometimes not - and attempt to work their way through a series of puzzles set by the alien Argonds.

Three people are stranded on a planet on the far side of the galaxy. In order to return to earth they must first locate a crystal to power their spacecraft. But to find the crystal they must navigate their way through a series of practical and mental problems, devised by a fiendish alien intelligence.—Anonymous