A few people are suddenly set on fire in central Tokyo. Joe's new pet, the dog Kubikuro, had earlier located the car that ran over his family. This awakens a huge anger in the little animal. 009 begins tracking the dog when it goes out on its nightly wanderings. Joe discovers that it is his dog that is seeking revenge for its beloved's death by setting the guilty bodies on fire with his glowing Cyborg eyes. It really hurts Joe to now see his pet, which he has been sharing so much joy. But the dog has become a blind machine with just one goal: to kill everyone in its way to slay its family's murderers. The dog succeeds but ends up attacking the policemen who are defending one of the criminals. Joe has no other choice then to shoot his friend.