Rogue yokai steal three dangerous objects. As Yusuke grapples with his new powers, children playing at a park mysteriously collapse to the ground.

Charged with reclaiming the final dangerous object, Yusuke infiltrates a mansion. Later, Koenma assigns him a powerful mentor to help with training.

On Kubikukuri Island, Yusuke's crew disperse to confront their foes. Locked in a prison cell, Keiko encounters Yukina and devises an escape plan.