A young boy named Agito enters a forbidden sanctuary where a glowing machine resides. This machine preserves a young girl named Toola, who has a mission entrusted by her from the past. Three-hundred years into the future, the Earth's environment has been ruined by the interference of mankind, and in between the 300 years, the forest has come to life and is at constant war with man.

A young boy named Agito enters a forbidden sanctuary where a glowing machine resides. This machine preserves a young girl named Toola, who has a mission entrusted by her from the past. Three-hundred years into the future, the Earth's environment has been ruined by the interference of mankind, and in-between the 300 years, the forest has come to life and is at constant war with man. It is an unsteady peace in an unnatural time.

Ages past, the Forest was awakened and the Moon unleashed a ravenous Beast upon the Earth. Man cowered in fear... Three hundred years later, the landscape of the world has been drastically rewritten and the remnants of humanity are divided. Half seek a tenuous coexistence with the Forest, half seek to dominate and subdue. Young Agito inadvertently sets in motion the destruction of all that is left when he revives a girl named Toola from her timeless slumber.