"Your task is to find the missing jewels which have been hidden in the house. Then to claim your prize?"[sic!] (from the inlay)
An unofficial conversion of the ZX Spectrum version is available for Atari 400/800; ported by devwebcl.
[+] Users who have solved this game
[+] Users currently playing this game
Some of these inlay blurbs... :D
The blurb makes sense in context... sort of. The only original trait of this "explore the big house" scenario is that, for once, you are not supposed to be there in the first place, though this doesn't add anything to the plot.