At the Spirit Base, the Kyoryugers are notified that the ninth Zyudenryu Plezuon is returning from space alongside its partner Kyoryu Violet. However, Plezuon is attacked while re-entering Earth's atmosphere. Arriving at the seaside crash site to find it has crashed into the ocean, the Kyoryugers are attacked by the Zetsumates who Chaos has resurrected to stop Plezuon's return. As the others deal with the Zetsumates and their Deboth MetsuBall attack, Kyoryu Red attempts to reach Plezuon but cannot swim. Luckily, he is saved by Kyoryu Violet who reveals that Plezuon has entered their undersea base before he tells Kyoryu Red to aid his friends as they escape the Zetsumates. With Torin guiding them, the Kyoryugers arrive at the Plezuon Lab where they meet the eccentric Doctor Ulshade and his granddaughter Yayoi. Feeling that they have heard his voice before, the Kyoryugers learn that Ulshade is the inventor of the Gaburivolvers before Daigo asks him where Kyoryu Violet is. But before Torin can reveal who Kyoryu Violet is, he senses the Zetsumates resuming their attack to lure the Kyoryugers out. Using multiple MetsuBalls to disarm the Kyoryugers, the Zetsumates have the upper hand before Ulshade arrives and reveals himself as Kyoryu Violet. But with his back out from his introduction, the Kyoryugers are forced to protect Kyoryu Violet before Torin takes him to safety while they intercept a MetsuBall and use it to defeat the Zetsumates. With Debo Nagareboshi enlarged, Kyoryu Violet gives Kyoryu Red the Plezuon Zyudenchi, as he intended earlier, to launch Plezuon to battle. Taking the fight to space, Plezuon transforms into Plezu-Oh to destroy Debo Nagareboshi. Despite this setback, Chaos reveals an ulterior motive as he requests Dogold's aid while contacting the others and the surviving Zetsumates to find Plezuon Lab and destroy it.