A superhero action adventure starring the Power Rangers, who must thwart the evil plot of space pirate Divatox, who wishes to free the demon Maligore from his volcanic tomb on the island of Muranthias, where only the good wizard Lerigot owns the one and only key that can free him. The Power Rangers need to utilize their new Turbo powers and Turbo Zords to emerge victorious.
Lerigot is a great wizard who lives on a faraway planet. Divatox, a space pirate and the Queen of Evil, desires his golden key in order to cross a dimensional barrier to enter into an evil partnership with the lava demon Maligore. While fleeing from Divatox, Lerigot travels to Earth to find his friend, Alpha 5, and ask the powerful wizard Zordon for help.
Meanwhile, Rocky, the Red Power Ranger, is training for a martial arts tournament when he injures his back. When Rocky's fellow Rangers - Tommy, Adam, Kat and Tanya - come to visit, a child named Justin accidentally witnesses Zordon calling them to the Power Chamber and revealing their identities.
Tommy, the Red Turbo Ranger, and Kat, the Pink Turbo Ranger, teleport to Africa to search for Lerigot. They eventually find him, and the three of them transport themselves back to the Power Chamber.
Divatox contacts Zordon and the Power Rangers through a telepathic transmission. She threatens to harm Lerigot's wife, Yara, and their baby, Batel, if he doesn't surrender to her. When Zordon and the others go to meet Divatox, her nephew, Elgar, tricks them and captures Lerigot.
The Rangers make use of their Turbo powers and fast car-like Zords to pursue their enemies. When Maligore awakens, Divatox orders him to attack the Rangers. The Rangers come together to form the Turbo Megazord and eventually defeat Maligore, prompting Divatox to retreat.