King Abyss

In the otherworldly kingdom of Barbaria, three types of superpowered beings—Earthcurrent, Anacurrent, and Horus—coexisted with ordinary humans. However, 21 years ago, King Balthazar suddenly issued a royal decree, beginning the extermination of Earthcurrents, excluding those in the capital city.

While traveling with his companions towards the royal capital to defeat Balthazar, Cal is suddenly confronted by a monster that entrusts him with a piece of its left arm, along with the words, "You will change the world." Soon after, the monster dies, and Lambert, a boy from Earthcurrent who appears as if following the monster, reveals that the monster is actually his older brother, who was subjected to biological experiments by scientists . To find out the true meaning behind the monster's inexplicable actions, Cal and his companions set out for Adama Island, the island the monster pointed to in its final moments.

As they continue their journey, Cal and her companions encounter a boy named Abyss who exudes a mysterious aura. Witnessing Abyss's extraordinary Earth Current abilities, Cal and her friends invite him to join them, but he turns out to be the son of their sworn enemy Balthazar and the next in line to the throne of Barbaria.