Ryugeom Cheok, a loyal Goryeo warrior, throws himself off a cliff with his enemy to protect his master—only to be frozen in ice for 900 years. Awakened in the modern era, the greatest swordsman of Goryeo begins his journey of vengeance…
The manga stars the black-silhouetted \"criminal\" who appears in Meitantei Conan series who represents the mystery culprits.
Kim Kigyu thought all of his problems were solved when he was offered an invitation to become a unique-ability player. He's been trying his best to level up, but his efforts have been in vain. Kigyu spent five long years working as a guide on the lower floors of the tower until he discovered his capacity to link with "Egos," which improved his stats. With his new abilities, Kigyu is determined to challenge old attitudes and show that one's rank does not dictate their value. He sees this as an opportunity to explore uncharted areas.