Achilles Chiorri, known as Aki, believes he is a normal twelve-year-old
like everyone else; that is, until he discovers he has the power to
travel to the distant worlds of the Parallel Crystals. With the help of
a mighty artifact, the Sphere of Time, Aki goes on his first great
journey and discovers that the gods and creatures he thought were only
myths, are actually alive and all too real. Aki, together with an
extraordinary girl and a special cat, is led by an elf of the Light as
he travels through the realms of the Crystal of Yggdrasil, where he will
encounter amazing creatures. To be able to return home, Aki must embark
on a dangerous mission that leads to an exciting series of events full
of twists and turns.