In a modern world where elves and demons coexist in hidden societies amid bustling cities, Kai Voss is a rare half-elf, half-demon hybrid. Orphaned young after a demonic rift scarred his face and awakened his dual powers—one eye glowing red with infernal fire, the other green with elven insight—Kai blends into urban life with his casual hoodie, scarf, and headphones. His long, black-and-red streaked hair is tied in a spiky bun. Now a teenager on the run from shadowy pursuers, he freelances as an investigator, using his abilities to solve supernatural mysteries while seeking clues to his parents' fate and a way to control his volatile heritage.