Jasper and Peridot under strict orders by diamond authority. They were ordered to keep a prisoner only known by one name, "the gem devourer" as is regular protocol. However, Peridot as well as Jasper, had no idea what was to unfold throughout transferring the new prisoner on their ship things go from bad to worse as the gem devourer ends up on earth causing for sky blue topaz and obsidian to deal with what Peridot and jasper couldn't handle with the help of some special familiar gems and half gem.