I've got you, Hypogean!" Gavus the Celestial is on the trail of the Hypogeans who stole a powerful "weapon". However, he unexpectedly crosses paths with Eugene, another Hypogean who claims to share the same goal as Gavus. Despite their doubts, these opposites reluctantly team up for a wild journey. A whimsical Hypogean and a noble Celestial embark on an extraordinary adventure.