After a theme park that revives extinct dinosaurs is opened in Tokyo, Shinnosuke's pet dog, Shiro, crosses paths with a small dinosaur. The two befriend each other, but their friendship might affect the existence of the park.

In a justice system that convicts virtually every defendant, one lawyer beats the odds for his clients — no matter how damning the evidence against them.

After a selfless act costs him his life, teen delinquent Yusuke Urameshi is chosen as a Spirit Detective to investigate cases involving rogue yokai.