Four years into the future, the world has lost its balance. Ten thousand metres of forest have vanished, leaving an endless desert that makes human habitation impossible. The survivors travel into the realm of Meshichi to coexist with the Anbots. Guided by fate, Sanzou and Gokyuu meet and begin traveling together. Sanzou is a young man shrouded in mystery, while Gokyuu is the strongest, and most troublesome, Anbot. Their group also includes Tongoh, an Anbot who loves drinking; Jou, a machine expert; Suuji, a female Anbot thief; and Mioto. Their journey takes them toward the boundless East, to the land where the sun was born.