Koichi and Jotaro have been able to climb the track of Morio's serial killer! But Morio's serial killer sets a trap and confronts them with Sheer Heart Attack, a small, totally indestructible assault tank! In the face of this terrible enemy, Jotaro is seriously wounded and only Koichi can still act. That's when Echoes, Koichi's stand, undergoes a new metamorphosis and develops a new power. Is that enough to overcome this extraordinary opponent?