In the distant future, the Earth is divided into two distinct parts. The southern hemisphere exists within a separate dimension, while the northern hemisphere is home to humans who have the ability to transform into ferocious beasts. Uranus, the leader of the southern humans, launches an attack on the savage creatures. The Tiger Tribe's Wan Derbard, Bud Mint from the Bird Tribe, Mei Mer and Tuttle Millen from the Mermaid Tribe are all imprisoned, but they manage to escape with the help of a young girl named Yuuni Charm Password. Together, they embark on a dangerous voyage in search of Gaia, a highly coveted treasure. However, their quest is plagued by relentless pursuit from Uranus's followers, including the merciless mage-knight V-Darn, the warrior woman V-Sion, and the malicious imp-like Akumako, who works closely with V-Darn.