South Korea's top hunter, Min Si-woo, known as 'Mad Dog,' defeated the Demon King with his disciples and was immediately sent to another world! After a century of relentless battles against monsters, he finally returned to Earth! "But why has everyone forgotten me?" A century in the other world was equivalent to only ten years on Earth. Min Si-woo, a hardened veteran after a century of bloody conflict, sets out to find his scattered disciples and uncover the reason his existence has been forgotten.

"Shigryang, buy me chicken"... alongside Frey, a mysterious creature he encountered in the other world.