Teen hooligan Yusuke is having a normal day until he makes the ultimate sacrifice by diving in front of a speeding car to save a boy's life.

After entering the Spirit World, Yusuke comes across Koenma, a 700-year-old ruler who has the body of a child.

With his foe Yusuke gone, Kuwabara is the new kid to defeat, which means he's making lots of enemies.

Spirit World forgot an imperative question: does anyone even want Yusuke to come back ? And will Yusuke give up the Spirit Beast, his one chance of reviving, when his friends all of a sudden find themselves in peril?

Back in the flesh, Yusuke discovers he can see mystic creatures hiding in the living realm and quickly hunts down a demon villian; Yusuke is now a Spirit Detective.

Three demon bandits have muscled their way into King Yama's vault, taking the three Artifacts of Darkness. Yusuke must retrieve the artefacts and bring the thieves to justice before they let their powers loose upon the Earth.