In which Taemin is a poor boy who claims he's a demi-god, and goes off to slay a deadly monster to prove it, only to be joined by a mysterious man named Jongin.

Inspired by Ancient Greek mythology, Korea creates a labyrinth of their own, sending in heroes to kill an unknown beast lurking within. No one has ever been successful, and now it is Do Kyungsoo's turn. But the labyrinth is twisted in more ways than one...