They call themselves the Alcea Rangers. Two fisherboys from Lorgo, a mage boy and his mage girlfriend from Trekum, and a mysterious girl from nowhere, these are the Collapse Children who dare to change the world. One of them is heir to the throne of Alcea. Another is a descendent of the Dark One, who must use the Sword of Heavens to destroy the evil sorcerer. Which two of these Collapse Children are actually the Children of the Ancient Prophecy is unknown.Led by a pair of supposed gypsies in Sapphire of the Fairies, these young adventurers came into possession of the Sword of Heavens, a powerful, ancient artifact that will guide them in their search for the Unicorns’ Opal.Unicorns’ Opal is a tale of adventure, mystery, and betrayal.