After a catastrophe on the night of the Azure Moon, crystals and gems known as Azure Gems started to appear all around the globe. These gems have been highly sort after over the many millennia for their immense power. However, in recent years, people have become wary of owning or even being near one of these gems. This is due to the actions of a group of infamous thieves that have made it their sole mission to collect all the Azure Gems. These three thieves are known as the Phantom of Omen, the Reaper of Judgment and the Spectre of Insight.