A nameless exile searches to find his home, only to discover it no longer exists. Meeting a young cat girl along the way, he continues his search for home- for his family.

Ten year-old Riff wakes up one day and has no idea who he is. After being hospitalized, doctors discover that he is quite extraordinary. Little does Riff know, he's the prince from another world, a parallel universe. And that world is stuck in civil war.

When Sebastion began investigating the murder of his mother, he discovers that he's really the son of an exiled princess. As his life slowly pieces together, he realizes that his life and the lives of those close to him are in grave danger.