Warriors were chosen to battle the Dark Science Empire Death Dark. They fight using Future Science and their weapons are inspired by gymnastics apparatus.

The Space Empire Zangyack forms an alliance with the Black Cross King, the resurrected form of the Gorengers' enemy the Black Cross Führer, in order to invade Earth with other revived Super Sentai enemies. The Gokaigers, along with the Goseigers, who have lost their powers from the Legend War, must team up in order to fight against the new enemy.

Jirokichi plays around during the day, but at night becomes a completely different person. His nickname is Nezumi-Kozo (“Rat Boy"). Jirokichi steals gold coins from corrupt samurai families and hands it over to the poor. He works with his younger sister Kosode.