Yusuke Urameshi, revived as a spirit world detective, defeats the evil monsters that appear one after another with his reliable friends Kuwabara, Kurama, and Hiei in order to protect peace between the human world and the spirit world. In front of them, a formidable enemy stands in their way... The battles gradually become more intense as the stages change from the human world to the spirit world to the demon world, and what lies ahead as the story deepens....