The series follows Juna Ariyoshi, a high school girl chosen to be the "Avatar of Time" and entrusted with saving the dying Earth.

The DVD release ("Arjuna: Director's Cut") featured remastered video and sound, and a previously unbroadcast "Chapter 9".

The story opens with Juna telling her boyfriend Tokio that she feels too cramped in the city, and deciding to take a trip to the Sea of Japan.

Supported by Chris, Tokio and SEED, an international organization that monitors the environment and confronts the Raaja, Juna must use her new powers to stop the Raaja from destroying Earth through humankind's destruction of the environmental systems of the planet, and Chris can only hope that she can fully awaken her powers in time to save the world.

Near the end of the series, Chris is revealed to be responsible for using a spillage of genetically engineered decomposition bacteria to summon Raajas that ravage Japan, causing everything including their modern clothes, gadgets, accessories, as well as food, water and electricity, to all be destroyed.

The idea of living in a city is a main theme, with both Juna and the Raaja rebelling against how removed from nature modern life is.

The old man Juna encounters in episode four explains the need for this return to nature in order to sustain life in the long term, a sentiment matured by the creator during his Asian journeys (not only India, but Nepal and other countries as well).

[6] The author himself introduced the work, back in the late year 2000, by declaring in an interview "[...we] live fragmented lifestyles that eat away at our future.

Director Shoji Kawamori says he instructed Kanno that the music was supposed to sound feminine, despite some of its use in action scenes.