One fateful day, Yuusuke Urameshi, a 14‑year‑old troublemaker with a bleak future, receives an extraordinary chance to change everything when he leaps in front of a speeding vehicle to protect a child. His self‑sacrifice, so unlike his usual attitude, leaves the spirit realm"s officials unsure whether he is ready to move on. Koenma, heir to the throne of the afterlife, grants Yuusuke a chance to reclaim his life by completing a set of missions. Guided by the death god Botan, he must eliminate malevolent forces on Earth as a Spirit Detective.
To aid him in this quest, Yuusuke summons former rival Kazuma Kuwabara and two demon‑former allies, Hiei and Kurama, each with a criminal history. Together they train and confront foes that threaten humanity"s very survival. Their bond strengthens as they face each peril, proving that even the darkest past can be redeemed.