Millions of years after the extinction of dinosaurs, the Deboth Army who caused it thaw from their Antarctic prison as its leader Chaos sends the Zorima to attack all corners of the world to finish what they have started with the human race as their new target. But a group of Zorima at an island in the southern sea were hindered from terrorizing the islanders by an adventurous youth referring to himself "King" before by a mysterious bird man arrives to give the youth, Daigo Kiryu, a petrified gun before summoning a T-Rex that wipes out the remaining Zorima. Introducing himself, Wise God Torin reveals to Daigo that the Zorima groups sent to other parts of the world have been quickly thwarted by a new generation of warriors called the Kyoryugers. Torin adds that Daigo must tame the T-Rex Zyudenryu Gabutyra in combat to become the fifth Kyoryuger. After a month of punishment, Daigo manages to tame Gabutyra though his Gaburivolver is still petrified. But sensing the Deboth Army gathering their strength, Torin teleports Daigo to the Tiger Boy restaurant in Japan where the youth meets a flirt, worker, a strong girl, and a youth. While the others end up in an argument, Daigo finds himself in Torin's Spirit Base and informs the curious deity of the amber pendant he got from his father. By then, Torin senses Gabutyra attempting to kill the Debo Monster Debo Hyogakki —the one responsible for the dinosaurs' extinction. Despite knowing the Zyudenryu's reasons to keep him from harm, Daigo confronts the Zorima while winning the thawed Gabutyra's respect to allow him to transform into Kyoryu Red. Giving Gabutyra his Zyudenchi, Kyoryu Red and his Zyudenryu battle the Zorima and Giant Zorima at all fronts before the other Kyoryugers arrive. While the other Kyoryugers deal with the Zorima, Kyoryu Red and Gabutyra join forces to destroy Debo Hyogakki. Though they prefer to remain anonymous, Daigo cancels his transformation as he introduces himself to the other Kyoryugers.