Yusuke Urameshi has survived many battles in life, death, and beyond. But as his teacher and mentor heads toward her own destruction, the Spirit Detective finds himself unable to do anything about it!

Long before Yusuke Urameshi perished and returned to Living World, Shinobu Sensui held court as Earth's Spirit Detective. Sensui was the prime example of humanity and goodness, diligently serving those he swore to protect.

With mere moments to go before the tunnel between the Living World and the Demon World opens unleashing hordes of beast on an unsuspecting population, Yusuke's team push their way into Sensui's Lair. But what they find there shocks them beyond belief!

After watching their comrade fall at the hands of former Spirit Detective, Sensui, Kuwabara, Kurama, and Hiei charge into action seeking vengeance for their recently departed friend. As if losing Yusuke wasn't bad enough, King Yama's soldiers arrive to confiscate the body ensuring that it can never be revived!