The alien astronaut XD quietly patrol the universe when suddenly a meteorite hits his spaceship. The strong impact launches the ship towards a system of unknown planets for him ... here we call it solar system.
XD gets the ship landing on Mercury but miraculously discovers what down is something even more miraculous, the planet is full of gems ... some gems on his home planet will become the richest of its kind to be ... and as he is in Mercury why not find out if the other planets have more of those precious jewels?
So our hero's adventure begins, and you must collect all the gems of the various planets of the solar system ... and some more. But beware, each planet has its own inhabitants who are not going to make things so easy.