"Present
The year 2000. Kasumi Shindo is at first glance a run-of-the-mill high school student in modern day Japan; however, beneath his normal appearance, Kasumi is in fact a top-notch treasure hunter.

"This time, Kasumi is aiming to find the lost 11th Commandment of Moses. Kasumi discovers that his childhood friend, Reina Tachibana, is in southern Europe participating on an archeological dig. Under the guise of being a tourist, he visits the excavation area and finagles himself into helping with the excavation. But he is not the only treasure hunter looking for the Eleventh Commandment of Moses and he gets himself embroiled in a dangerous adventure.

"Past
1200 BC. A time when God was still demonstrating his powers and making his presence felt to those in the world and people lived simply in small communal groups. One of these hamlets was that of Will Arc. But when the village chieftain Martha refuses to be sacrificed to God, she throws the future of the village into uncertainty. When Martha realizes that she is at death's door, she leaves her son, the Great Swordsman Ales with her last wish before passing away. In order to convey Martha's final words, ALES strikes out alone on a quest for Will, a girl known as "The Song of God."

"Future
The year 13,800. Due to an apocalypse that ravaged the entire earth several centuries earlier, humans have been relegated to the position of an endangered species on blighted land. Only a small sliver of green is left, the acidic oceans are aflame and the blue skies remain no more. The earth cannot even produce sustenance for people to survive.

"Sui was raised the daughter of a florist in City Gilde, but on her 18th birthday things suddenly shift and her peaceful, if poor, life is thrown into turmoil. A sudden coup d'etat occurs and, fatally injured in the fray, her surrogate mother, Nene, relays to her a shocking message with her dying words - Sui is actually the last surviving member of the royal family and a princess heir to the throne. So Sui sets out on a journey with Laliela to take the Key of Will bequeathed to her by Nene to the Sage U.