With eight members in their team, the Kyurangers confront Eriedrone and Stinger. Lucky once again asks Stinger to join their cause. Divided between his faith and his feelings, Stinger makes the final decision.

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.

The Kyurangers track down the location of the Ho Kyutama, one of the components of Argo, on Planet Vela, whose people are suffering with the pollution caused by Jark Matter. Meanwhile, Stinger finally comes face to face with his brother.

Stinger and Champ are eager to settle their scores with Scorpio, but he approaches Stinger instead and tells him that he is working inside Jark Matter to kill Don Armage instead. Stinger agrees to listen to him, unaware of his true intentions.

Stinger accompanies Champ who was heavily damaged while protecting him from Scorpio for repairs. Meanwhile, the others have a hard time against a new enemy that can't be seen, until Lucky obtains a new, powerful Kyutama to fight back.

The Kyurangers set out to look for the Ryukotsu Kyutama on Planet Keel, but Scorpio steals it and they must fight him for its possession.

Stinger returns to Earth to confront Scorpio alone but ends up controlled by his poison. Kotaro also returns and joins the other Kyurangers to help him.

The Kyurangers have their decisive battle against Scorpio, and finally assemble the three Argo Kyutamas, gaining a new and powerful ally.