The series tells the story of Yusuke Urameshi, a teenage delinquent who is struck by a car while trying to save a child's life. While in the afterlife, he is named the Spirit Detective by Koenma & Botan and must investigate cases concerning demons and apparitions. Yusuke travels with his friends Kuwabara, Kurama, and Hiei, the other protagonists of the story. As the series progresses, the series strays away from a detective story to a more fighting-oriented story.2 Disc in each 

complete Season 3 Disc 1 & 2 ,3 & 4

Complete Season 4 Disc 1 & 2