In this suspenseful sequel to The World of Karov, a ruby discovered in a mountain stream transports Joshua, and his best friend Sean, to the war-torn world of Karov. They are immediately caught up in a violent struggle between the people and their treacherous king, who is determined to find the legendary four-pound ruby hidden deep in the emerald caverns. But time is running out. The king is closing in on Joshua and the gem, and the boys must help the Karovites find it before the king does. For if the king gets to it first, he will become the most powerful being in the universe and the Karovites will be enslaved... forever.