The supreme ruler of the Dragon Kingdom, Nicodemus, was bestowed the title of Lord of Martial Peace. He has been living under a different name since six years ago, working as a security guard, secretly investigating the tragedy at TM Pass where a hundred thousand soldiers of the kingdom perished, while also searching for the woman who saved him. Unexpectedly, the little girl he happened to rescue of an accident turned out to be the daughter of that very woman. From then on, he became a father figure, gradually unraveling the truth of the past.