Kunihiko Ito

An elite superhuman agent must stop a foreign military unit from seizing control of an ancient artifact that holds the key to ultimate power.

When the Spirit World is flooded due to an unusual rainfall which overflows the River Sanzu (aka the River Styx), Lord Koenma senses an extremely powerful enemy. He entrusts Death God Botan, to deliver to Spirit Detective Yusuke, a mysterious item which must be protected from the invading enemy. However, by the time Botan finds Yusuke, she's too weak to explain the situation. Yusuke and his friends are left in the dark about the new enemy, but not for long. Soon it is a battle for Earth between mere Spirit Detectives and the almighty king of the Netherworld.

U.C. 0083 - Three years after the end of the catastrophic One Year War, peace on Earth and the colonies is shattered by the presence of the Delaz Fleet, a rogue Zeon military group loyal to the ideals of the late dictator Gihren Zabi. Delaz Fleet's ace pilot Anavel Gato, once hailed as "The Nightmare of Solomon", infiltrates the Federation's Torrington base in Australia and steals the nuclear-armed Gundam GP02A "Physalis" prototype. Rookie pilot Kou Uraki - with the aid of Anaheim Electronics engineer Nina Purpleton and the crew of the carrier Albion - pilots the Gundam GP01 "Zephyranthes" prototype in an attempt to recover the stolen Gundam unit and prevent another war from breaking out.