The story begins when Geki Red battles Nunchaku Banki after returning from his trip around the world for Natsume's birthday, with Geki Yellow and Geki Blue arriving to provide backup. After sending the Gekirangers into another dimension, the Go-ongers arrive before the Savage Machine Beast departs after his quarry. After clearing a misunderstanding with Geki Violet and Geki Chopper, the two bring them to SCRTC to see Master Xia Fu, with Hant revealing he met Miki at one of his past jobs at the Bakuryū Sentai Abaranger. After taking Xia Fu to the site, realizing the Gaiark are after Dōkokugan, he opens the path for them to follow as the Gekirangers are overwhelmed by Nunchaku Banki, who demands the sealed Long from Jyan. After the Gekirangers' reunion and meeting the Go-ongers, they take out the Ugats and overwhelm Nunchaku Banki. In retaliation, he steals the Engine Souls as the Pollution Ministers arrive with the mastermind of their scheme, Meka, who reveals himself as the last of Rinjū Hall's fighters. Using the Engine Souls as his hostages, Meka tricks Jyan in giving up the Dōkokugan to save the Engine Souls before sending the Rangers back to their world. As Meka pounds the Dōkokugan into an Engine Soul that is implanted into Nunchaku Banki, the Gekirangers attempt to teach the Go-ongers the ways of the Gekijūken style. Nunchaku Banki arrives to test his new-found power with Meka overseeing it to take in the suffering. The Go-on Wings arrive to take the two trouble makers out of the city before fighting them with what they learned from Gorie.