A 40th-anniversary reimagining of Mitsuteru Yokoyama's manga classic through the cerebral eyes of Chiaki J. Konaka (Serial Experiments Lain). It's the 21st century, and mankind is threatened by a terrorist organization who wield GRs - ancient titans from a bygone age. The United Nations races against the clock to unearth the remaining GRs first. Teenage scuba diver Daisaku Kusama finds himself drawn into the conflict when he discovers the mighty GR-1 and forms a psychic bond with it. Now Daisaku must combat the other GRs threatening Earth and uncover their dubious past.