With Stinger and Champ looking for Scorpio and Kotaro temporarily absent for training, the other Kyurangers' next mission is to rescue the people imprisoned at the Space Dragon Palace Castle. Garu, who is upset because he has not been chosen for deployment lately, has his wish granted when the Kyulette selects him to join the Palace's infiltration team.
After reclaiming the Tomo Kyutama, the Kyurangers must wait for the Rashinban Kyutama to recharge in order to look for the next piece of the Argo and take their time continuing with their campaign against Jark Matter's forces on Earth. However, their next enemy is Scorpio, the Karo of the Scorpius System and Stinger's older brother, who uses his poison to transform his victims into zombies.
After Ikargen steals the Tomo Kyutama from the Kyurangers, the team looks for a way to get past his mysterious ability to evade all their attacks. Shou comes with an idea to outsmart him, but Lucky is still shaken by his string of bad luck and stays behind, until he decides to bring up his courage and fight back.
Shou informs the other Kyurangers of their next move, which is to assemble three special Kyutamas that together, unlock the power of the legendary spaceship "Argo", necessary to bring down Jark Matter. However, Lucky has an unusual string of bad luck and trying to prove himself despite that, he confronts Ikargen and the revived Mardakko alone.
As the other Kyurangers face a crisis when the Orion goes haywire, Lucky takes Kotaro back to Earth, but when they are attacked by the enemy, Big Bear's spirit appears to them, and after witnessing Kotaro's true determination to protect the world, grants him the power to fight as the 11th Kyuranger.
Now with the team complete, the Kyurangers decide to start their campaign to liberate the universe with Earth. Lucky obtains the Pegasus Kyutama that grants him a special armor. However, he fails to control it and the team takes part in a rather unusual training routine to help him master it as they encounter the powerful Ikargen and Mardakko.
The Orion, the Kyurangers spaceship, heads towards Earth. There’s always one Daikaan on every planet, but there are multiple Daikaan confirmed to be on board the Moraimarz on Earth. Lucky and the others head down to investigate, where the Daikaan known as Yumepakkun steals and eats the dreams of children. Meanwhile, Raptor 238 dreams of fighting together with the Kyurangers, and her wild ideas and fascinations with fighting are only getting bigger.
The search is on for the remaining four Kyurangers. Lucky lands on Planet Jigama and encounters Balance and Nāga. They call themselves the “Phantom Thief Group BN”, stealing only from Jark Matter. Lucky hears their next aim is to steal a jewel from Jark Matter’s space ship Moraimarz. They soon meet the first Daikan commander, Gamettsui, who Balance betrayed. Elsewhere, Jark Matter’s general, Eridron, appears before Hammy and the others.
88 constellations that exist in the universe have fallen into the hands of the evil Space Shogunate Jark Matter. However, the insurrection army Rebellion and three Kyurangers chosen by the Kyutama are opposing them to protect the people. By an accident, an adventurer traveling through space, Lucky witnesses Chamaeleon Green, Oushi Black, and Kajiki Yellow fighting on the planet Cthros. Lucky decides to become the 4th Kyuranger and they set out to planet Jagujagu to search for the Kyutama.