In the country Assham, an uprising has started. Traces of a confusion ray appear on the body of the leader who has been shot. Thinking that a few hundred people have been bathed in that ray, the Science Ninja Team sneaks into the country.
During the investigation, Ken and Jinpei notice that the peackocks, which are the country's national birds and which are bred and released in the country, are robots. The peacock mechas cover the two men with confusion rays. Ken pushes Jinpei away and saves him from the rays, but he is attacked by the Peacock Devil, which then takes with him the car Ken has hidden in. Ken's boomerang remains behind.
The Science Ninja Team receives a broadcast showing the car that Ken was in, being destroyed. They are grieving when the message reaches them that the mecha has appeared again. The Science Ninja Team says it's a fight in memory of Ken and gets going.
The God Phoenix has to fight hard against the mecha, getting bathed in the confusion ray. However, Ken has escaped from the car and destroys the launching device in the mecha. The iron ball, which was about to be launched, opens a hole in the hull of the mecha and Ken can go to the outside of the mecha. Ken contacts Joe and tells him to shoot a rocket with a timing device into the mecha.
Because of the rocket shot into the mecha, panic arises and Katse ends up getting away. Just before the mecha crashes on the soil, Ken detaches himself from the hull. The timing device moves and the mecha explodes.
His comrades are happy that Ken survived. Jun returns the boomerang to Ken's hand.
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