Park Ji-han is a 20-year-old man who is possessed by a powerful demon named "Ramum." In his normal state, Park Ji-han is already a highly skilled and physically capable fighter, displaying an incredible level of strength, speed, and coordination. His quick reflexes and critical thinking skills make him a formidable opponent in any battle. However, when Ramum takes control of his body, ramum becomes a true terror. The demon's power coupled with Park Ji-han's innate strength and abilities