After his second death, Kim Min Ho (now Kieran Monroe) is reincarnated into a fantasy world by the God of Darkness, Thamuz. Here, he must navigate a world filled with monsters and magic while protecting his brother, Kim Rok Soo (now Cale Henituse), who also reincarnated into this world. Kieran uses his intelligence and new abilities to assist Cale, who aims to survive and enjoy a peaceful life. However, looming threats from powerful beings and impending wars force the brothers to take action.