A group of teenagers with special powers known as the Power Rangers are tasked with defending Earth from evil forces. As the movie opens, Angel Grove is experiencing a period of peace, but this serenity is shattered when construction workers accidentally unearth an ancient, evil entity named Ivan Ooze. Sealed away by the Power Rangers' mentor, Zordon, Ivan Ooze is bent on exacting revenge. He wastes no time in attacking the Command Center, leaving Zordon severely weakened and the Rangers powerless. Desperate to save their friend and mentor, the Rangers travel to the distant planet of Phaedos to seek the power needed to restore their abilities.

On Phaedos, the Rangers undergo rigorous trials and receive guidance from Dulcea, a powerful warrior who helps them tap into newfound animal-based powers. With their new abilities and renewed determination, they gear up to face Ivan Ooze. Meanwhile, back in Angel Grove, Ivan gains control over Zordon’s nemesis Rita Repulsa and her henchmen while spreading chaos through the city. The Rangers must confront their greatest challenge yet and use their upgraded powers to defeat Ivan and save Zordon, all while protecting the Earth from falling under an age of darkness.